UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-Q QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANIES INVESTMENT COMPANY ACT FILE NUMBER: 811-21080 EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER: Calamos Convertible Opportunities and Income Fund ADDRESS OF PRINCIPAL EXECUTIVE OFFICES: 2020 Calamos Court, Naperville Illinois 60563 NAME AND ADDRESS OF AGENT FOR SERVICE: James S. Hamman, Jr., Secretary, Calamos Advisors, LLC, 2020 Calamos Court, Naperville, Illinois 60563 REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (630) 245-7200 DATE OF FISCAL YEAR END: October 31, 2007 DATE OF REPORTING PERIOD: January 31, 2007 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND ITEM 1. SCHEDULE OF INVESTMENTS January 31, 2007 (UNAUDITED) CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- CORPORATE BONDS (79.9%) CONSUMER DISCRETIONARY (29.1%) $ 2,261,000 Asbury Automotive Group, Inc. 9.000%, 06/15/12 $ 2,376,876 7,507,000 Aztar Corp. 7.875%, 06/15/14 8,205,151 11,759,000 Beazer Homes USA, Inc.< 8.375%, 04/15/12 12,141,167 4,523,000 DEX Media, Inc.< 8.000%, 11/15/13 4,737,843 10,999,000 DIRECTV Financing Company, Inc. 8.375%, 03/15/13 11,562,699 EchoStar DBS Corp. 4,771,000 7.125%, 02/01/16 4,812,746 724,000 6.625%, 10/01/14 711,330 7,209,000 GBP EMI Group, PLC 9.750%, 05/20/08 14,795,203 6,332,000 Expedia, Inc.*< 7.456%, 08/15/18 6,534,421 5,427,000 Ford Motor Company 8.625%, 11/01/10 5,611,941 4,975,000 GameStop Corp.< 8.000%, 10/01/12 5,285,938 1,357,000 General Motors Acceptance Corp. 6.875%, 09/15/11 1,378,522 General Motors Corp. 8,141,000 7.200%, 01/15/11 7,957,827 1,357,000 7.125%, 07/15/13< 1,319,683 Goodyear Tire & Rubber Company 7,688,000 7.000%, 03/15/28 6,919,200 3,618,000 7.857%, 08/15/11< 3,717,495 2,714,000 Group 1 Automotive, Inc. 8.250%, 08/15/13 2,808,990 5,201,000 Hanes Brands, Inc.*++ 8.735%, 12/15/14 5,370,033 3,618,000 Hasbro, Inc. 6.600%, 07/15/28 3,546,736 5,201,000 Idearc, Inc.* 8.000%, 11/15/16 5,311,521 2,714,000 Interpublic Group of Companies, Inc.< 7.250%, 08/15/11 2,781,850 12,663,000 Isle of Capri Casinos, Inc. 9.000%, 03/15/12 13,296,150 3,446,000 Jarden Corp. 9.750%, 05/01/12 3,665,683 2,507,000 Kellwood Company< 7.625%, 10/15/17 2,292,759 3,618,000 Landry's Restaurants, Inc.< 7.500%, 12/15/14 3,581,820 2,714,000 Liberty Media Corp.< 8.250%, 02/01/30 2,695,881 5,201,000 Linens 'n Things, Inc.< ++ 10.985%, 01/15/14 5,070,975 15,829,000 MGM Mirage< 8.375%, 02/01/11 16,719,381 PRINCIPAL AMOUNT VALUE ------------ --------------- $ 7,055,000 NCL Holding, ASA 10.625%, 07/15/14 $ 7,213,738 2,714,000 OfficeMax, Inc. 7.125%, 10/15/14 2,659,720 4,070,000 Oxford Industries, Inc. 8.875%, 06/01/11 4,232,800 4,523,000 Phillips-Van Heusen Corp.< 8.125%, 05/01/13 4,771,765 1,809,000 Reader's Digest Association, Inc. 6.500%, 03/01/11 1,858,748 1,809,000 Rent-A-Center, Inc. 7.500%, 05/01/10 1,836,135 2,578,000 RH Donnelley Financial Corp.* 10.875%, 12/15/12 2,816,465 2,714,000 Royal Caribbean Cruises, Ltd.< 7.500%, 10/15/27 2,678,254 724,000 Station Casinos, Inc. 6.875%, 03/01/16 666,080 7,236,000 Time Warner, Inc. 7.625%, 04/15/31 8,134,653 11,487,000 Vail Resorts, Inc. 6.750%, 02/15/14 11,372,130 4,523,000 Warnaco Group, Inc. 8.875%, 06/15/13 4,828,303 Warner Music Group 7,191,000 7.375%, 04/15/14 7,119,090 905,000 GBP 8.125%, 04/15/14 1,826,948 724,000 Wynn Las Vegas, LLC 6.625%, 12/01/14 720,380 --------------- 227,945,030 --------------- CONSUMER STAPLES (10.2%) 905,000 Alimentation Couche-Tard, Inc. 7.500%, 12/15/13 925,363 2,668,000 Central Garden & Pet Company 9.125%, 02/01/13 2,794,730 4,523,000 Chattem, Inc. 7.000%, 03/01/14 4,489,078 3,618,000 Chiquita Brands International, Inc.< 8.875%, 12/01/15 3,437,100 5,608,000 Del Monte Foods Company 8.625%, 12/15/12 5,944,480 11,306,000 Dole Food Company, Inc.< 8.875%, 03/15/11 11,306,000 10,854,000 Jean Coutu Group, Inc. 8.500%, 08/01/14 11,342,430 3,166,000 NBTY, Inc. 7.125%, 10/01/15 3,173,915 Pilgrim's Pride Corp. 3,437,000 8.375%, 05/01/17< 3,402,630 1,538,000 7.625%, 05/01/15 1,530,310 5,427,000 Pinnacle Foods Holding< 8.250%, 12/01/13 5,576,242 5,065,000 Playtex Products, Inc. 8.000%, 03/01/11 5,324,581 Reynolds American, Inc. 4,975,000 7.300%, 07/15/15 5,181,945 2,714,000 7.625%, 06/01/16 2,884,903 See accompanying Notes to Schedule of Investments 1 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- $ 9,045,000 Smithfield Foods, Inc. 7.750%, 05/15/13 $ 9,248,512 2,714,000 SUPERVALU, Inc. 7.500%, 11/15/14 2,841,447 --------------- 79,403,666 --------------- ENERGY (11.1%) 6,286,000 Arch Western Finance, LLC 6.750%, 07/01/13 6,238,855 8,141,000 Chesapeake Energy Corp. 7.500%, 06/15/14 8,415,759 5,879,000 Comstock Resources, Inc. 6.875%, 03/01/12 5,665,886 606,000 Energy Partners, Ltd. 8.750%, 08/01/10 618,120 2,714,000 Forest Oil Corp. 8.000%, 12/15/11 2,829,345 4,222,000 Giant Industries, Inc. 11.000%, 05/15/12 4,517,540 2,261,000 Hanover Compressor Company 9.000%, 06/01/14 2,419,270 1,809,000 Mariner Energy, Inc. 7.500%, 04/15/13 1,763,775 5,065,000 Petrohawk Energy Corp. 7.125%, 04/01/12 4,862,400 10,221,000 Petroleo Brasileiro, SA< 8.375%, 12/10/18 12,122,106 Premcor Refining Group, Inc. 5,789,000 9.500%, 02/01/13 6,231,882 2,465,000 7.500%, 06/15/15 2,530,855 2,714,000 Range Resources Corp. 7.375%, 07/15/13 2,768,280 3,166,000 Superior Energy Services, Inc. 6.875%, 06/01/14 3,118,510 6,332,000 Swift Energy Company< 9.375%, 05/01/12 6,680,260 4,523,000 Whiting Petroleum Corp.< 7.250%, 05/01/13 4,511,692 Williams Companies, Inc. 9,045,000 7.750%, 06/15/31 9,542,475 1,809,000 7.500%, 01/15/31 1,890,405 --------------- 86,727,415 --------------- FINANCIALS (2.9%) E*TRADE Financial Corp. 5,970,000 7.375%, 09/15/13 6,223,725 4,070,000 7.875%, 12/01/15< 4,375,250 1,085,000 8.000%, 06/15/11 1,137,894 6,784,000 Leucadia National Corp. 7.000%, 08/15/13 6,834,880 1,538,000 Omega Healthcare Investors, Inc. 7.000%, 04/01/14 1,545,690 2,273,000 Senior Housing Properties Trust 7.875%, 04/15/15 2,363,920 --------------- 22,481,359 --------------- HEALTH CARE (5.3%) 3,708,000 Ameripath, Inc.< 10.500%, 04/01/13 4,041,720 PRINCIPAL AMOUNT VALUE ------------ --------------- $ 3,618,000 Angiotech Pharmaceuticals, Inc. 7.750%, 04/01/14 $ 3,346,650 7,643,000 Bausch & Lomb, Inc. 7.125%, 08/01/28 7,684,784 1,538,000 Bio-Rad Laboratories, Inc. 7.500%, 08/15/13 1,599,520 1,809,000 Biovail Corp. 7.875%, 04/01/10 1,856,486 678,000 DaVita, Inc. 7.250%, 03/15/15 689,865 543,000 Omnicare, Inc.< 6.875%, 12/15/15 538,928 4,070,000 Psychiatric Solutions, Inc. 7.750%, 07/15/15 4,080,175 7,688,000 Tenet Healthcare Corp.< 9.250%, 02/01/15 7,707,220 4,070,000 Valeant Pharmaceuticals International 7.000%, 12/15/11 3,927,550 5,879,000 Vanguard Health Systems, Inc.< 9.000%, 10/01/14 6,048,021 --------------- 41,520,919 --------------- INDUSTRIALS (4.6%) 2,261,000 Armor Holdings, Inc. 8.250%, 08/15/13 2,374,050 905,000 FTI Consulting, Inc.< 7.625%, 06/15/13 931,019 2,714,000 Gardner Denver, Inc. 8.000%, 05/01/13 2,842,915 2,714,000 GATX Corp.< 8.875%, 06/01/09 2,901,323 5,879,000 General Cable Corp.< 9.500%, 11/15/10 6,231,740 1,156,000 Global Cash Access, Inc. 8.750%, 03/15/12 1,213,800 1,447,000 H&E Equipment Service, Inc. 8.375%, 07/15/16 1,537,437 IKON Office Solutions, Inc. 1,809,000 7.750%, 09/15/15 1,913,017 1,809,000 6.750%, 12/01/25 1,595,721 1,357,000 Sequa Corp. 8.875%, 04/01/08 1,401,103 6,332,000 Terex Corp. 7.375%, 01/15/14 6,490,300 1,809,000 Trinity Industries, Inc. 6.500%, 03/15/14 1,786,387 3,143,000 WESCO International, Inc. 7.500%, 10/15/17 3,174,430 1,809,000 Williams Scotsman International, Inc. 8.500%, 10/01/15 1,890,405 --------------- 36,283,647 --------------- INFORMATION TECHNOLOGY (5.4%) 5,276,000 Advanced Micro Devices, Inc. 7.750%, 11/01/12 5,407,900 633,000 Anixter International, Inc. 5.950%, 03/01/15 602,141 See accompanying Notes to Schedule of Investments 2 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- $ 633,000 Avago Technologies*< 11.875%, 12/01/15 $ 696,300 3,618,000 Celestica, Inc.< 7.875%, 07/01/11 3,554,685 4,523,000 Flextronics International, Ltd.< 6.500%, 05/15/13 4,409,925 5,201,000 Freescale Semiconductor, Inc.* 8.875%, 12/15/14 5,201,000 339,000 Sanmina-SCI Corp. 8.125%, 03/01/16 324,593 6,196,000 SunGard Data Systems, Inc. 9.125%, 08/15/13 6,552,270 Xerox Corp. 8,593,000 8.000%, 02/01/27< 8,807,825 6,332,000 7.625%, 06/15/13 6,616,940 --------------- 42,173,579 --------------- MATERIALS (6.5%) 905,000 Agrium, Inc. 7.125%, 05/23/36 952,751 905,000 Crown Holdings, Inc. 7.750%, 11/15/15 941,200 4,523,000 Equistar Chemicals, LP 10.625%, 05/01/11 4,816,995 724,000 Gibraltar Industries, Inc. 8.000%, 12/01/15 716,760 Ineos Group Holdings, PLC* 4,342,000 EUR 7.875%, 02/15/16 5,347,890 905,000 8.500%, 02/15/16< 871,063 6,743,000 IPSCO, Inc. 8.750%, 06/01/13 7,265,582 3,618,000 Neenah Paper, Inc. 7.375%, 11/15/14 3,500,415 7,236,000 Sealed Air Corp.* 6.875%, 07/15/33 7,209,372 3,460,000 Terra Industries, Inc.*+ 7.000%, 02/01/17 3,425,400 1,809,000 Texas Industries, Inc. 7.250%, 07/15/13 1,858,748 4,523,000 The Mosaic Company* 7.625%, 12/01/16 4,647,382 Union Carbide Corp. 3,618,000 7.500%, 06/01/25 3,735,733 2,804,000 7.875%, 04/01/23 3,003,572 2,894,000 Westlake Chemical Corp. 6.625%, 01/15/16 2,850,590 --------------- 51,143,453 --------------- TELECOMMUNICATION SERVICES (3.9%) 2,714,000 CenturyTel, Inc. 6.875%, 01/15/28 2,633,421 543,000 Citizens Communications Company 9.000%, 08/15/31 587,798 1,809,000 iPCS, Inc. 11.500%, 05/01/12 2,007,990 2,714,000 Leap Wireless International, Inc.*< 9.375%, 11/01/14 2,863,270 PRINCIPAL AMOUNT VALUE ------------ --------------- $ 2,714,000 Qwest Communications International, Inc.< 7.750%, 02/15/31 $ 2,714,000 3,392,000 CAD Rogers Communications, Inc. 7.250%, 12/15/11 3,148,380 4,070,000 CAD Rogers Wireless, Inc. 7.625%, 12/15/11 3,845,922 9,045,000 Sprint Nextel Corp. 7.375%, 08/01/15 9,278,587 3,618,000 Syniverse Technologies, Inc. 7.750%, 08/15/13 3,645,135 --------------- 30,724,503 --------------- UTILITIES (0.9%) 1,131,000 Edison International 7.730%, 06/15/09 1,170,585 905,000 NRG Energy, Inc. 7.250%, 02/01/14 909,525 5,427,000 TXU Corp. 6.500%, 11/15/24 5,052,776 --------------- 7,132,886 --------------- TOTAL CORPORATE BONDS (Cost $606,594,220) 625,536,457 --------------- CONVERTIBLE BONDS (19.8%) CONSUMER DISCRETIONARY (6.1%) 5,500,000 EchoStar Communications Corp. 5.750%, 05/15/08 5,616,875 1,870,000 Liberty Media Corp. (CBS Corp.) & 3.250%, 03/15/31 1,617,550 5,500,000 GBP Punch Taverns Redwood Jersey Company, Ltd. 5.000%, 12/14/10 13,291,184 9,000,000 The Interpublic Group of Companies, Inc.*++ 5.710%, 06/15/09 11,648,700 United Auto Group, Inc. 3,040,000 3.500%, 04/01/26 3,545,400 1,960,000 3.500%, 04/01/26* 2,285,850 7,500,000 Walt Disney Company< 2.125%, 04/15/23 9,365,625 --------------- 47,371,184 --------------- CONSUMER STAPLES (0.7%) 3,500,000 Church & Dwight Co., Inc. 5.250%, 08/15/33 5,346,250 --------------- FINANCIALS (0.3%) 2,500,000 Travelers Property Casualty Corp. 4.500%, 04/15/32 2,576,000 --------------- HEALTH CARE (1.6%) 5,000,000 Health Management Associates, Inc.< 4.375%, 08/01/23 5,187,500 6,500,000 Wyeth< ++ 4.877%, 01/15/24 6,982,950 --------------- 12,170,450 --------------- See accompanying Notes to Schedule of Investments 3 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- INDUSTRIALS (1.7%) $ 5,500,000 Lockheed Martin Corp.< ++ 5.124%, 08/15/33 $ 7,601,990 5,000,000 Quanta Services, Inc.* 3.750%, 04/30/26 5,743,750 --------------- 13,345,740 --------------- INFORMATION TECHNOLOGY (7.8%) 3,000,000 Andrew Corp. 3.250%, 08/15/13 3,060,000 2,000,000 ASM International NV 4.250%, 12/06/11 2,412,068 16,250,000 Electronic Data Systems Corp.< 3.875%, 07/15/23 17,042,188 25,250,000 Intel Corp.< 2.950%, 12/15/35 23,230,000 Mentor Graphics Corp. 5,000,000 6.250%, 03/01/26* 6,687,500 2,500,000 6.250%, 03/01/26< 3,343,750 5,370,000 Vishay Intertechnology, Inc. 3.625%, 08/01/23 5,356,575 --------------- 61,132,081 --------------- UTILITIES (1.6%) 1,750,000 EUR International Power, PLC 3.250%, 07/20/13 2,777,554 2,950,000 GBP Scottish & Southern Energy, PLC 3.750%, 10/29/09 9,817,868 --------------- 12,595,422 --------------- TOTAL CONVERTIBLE BONDS (Cost $140,755,390) 154,537,127 --------------- SYNTHETIC CONVERTIBLE SECURITIES (9.9%) CORPORATE BONDS (8.4%) CONSUMER DISCRETIONARY (3.1%) 239,000 Asbury Automotive Group, Inc. 9.000%, 06/15/12 251,249 793,000 Aztar Corp. 7.875%, 06/15/14 866,749 1,241,000 Beazer Homes USA, Inc.< 8.375%, 04/15/12 1,281,332 477,000 DEX Media, Inc.< 8.000%, 11/15/13 499,658 1,161,000 DIRECTV Financing Company, Inc. 8.375%, 03/15/13 1,220,501 EchoStar DBS Corp. 504,000 7.125%, 02/01/16 508,410 76,000 6.625%, 10/01/14 74,670 761,000 GBP EMI Group, PLC 9.750%, 05/20/08 1,561,818 668,000 Expedia, Inc.*< 7.456%, 08/15/18 689,355 573,000 Ford Motor Company 8.625%, 11/01/10 592,527 525,000 GameStop Corp.< 8.000%, 10/01/12 557,812 PRINCIPAL AMOUNT VALUE ------------ --------------- $ 143,000 General Motors Acceptance Corp. 6.875%, 09/15/11 $ 145,268 General Motors Corp. 859,000 7.200%, 01/15/11 839,672 143,000 7.125%, 07/15/13< 139,068 Goodyear Tire & Rubber Company 812,000 7.000%, 03/15/28 730,800 382,000 7.857%, 08/15/11< 392,505 286,000 Group 1 Automotive, Inc. 8.250%, 08/15/13 296,010 549,000 Hanes Brands, Inc.*++ 8.735%, 12/15/14 566,842 382,000 Hasbro, Inc. 6.600%, 07/15/28 374,476 549,000 Idearc, Inc.* 8.000%, 11/15/16 560,666 286,000 Interpublic Group of Companies, Inc.< 7.250%, 08/15/11 293,150 1,337,000 Isle of Capri Casinos, Inc. 9.000%, 03/15/12 1,403,850 364,000 Jarden Corp. 9.750%, 05/01/12 387,205 265,000 Kellwood Company< 7.625%, 10/15/17 242,354 382,000 Landry's Restaurants, Inc.< 7.500%, 12/15/14 378,180 286,000 Liberty Media Corp.< 8.250%, 02/01/30 284,091 549,000 Linens 'n Things, Inc.< ++ 10.985%, 01/15/14 535,275 1,671,000 MGM Mirage< 8.375%, 02/01/11 1,764,994 745,000 NCL Holding, ASA 10.625%, 07/15/14 761,762 286,000 OfficeMax, Inc. 7.125%, 10/15/14 280,280 430,000 Oxford Industries, Inc. 8.875%, 06/01/11 447,200 477,000 Phillips-Van Heusen Corp.< 8.125%, 05/01/13 503,235 191,000 Reader's Digest Association, Inc. 6.500%, 03/01/11 196,253 191,000 Rent-A-Center, Inc. 7.500%, 05/01/10 193,865 272,000 RH Donnelley Financial Corp.* 10.875%, 12/15/12 297,160 286,000 Royal Caribbean Cruises, Ltd.< 7.500%, 10/15/27 282,233 76,000 Station Casinos, Inc. 6.875%, 03/01/16 69,920 764,000 Time Warner, Inc. 7.625%, 04/15/31 858,883 1,213,000 Vail Resorts, Inc. 6.750%, 02/15/14 1,200,870 477,000 Warnaco Group, Inc. 8.875%, 06/15/13 509,197 Warner Music Group 759,000 7.375%, 04/15/14 751,410 See accompanying Notes to Schedule of Investments 4 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- $ 95,000 GBP 8.125%, 04/15/14 $ 191,779 76,000 Wynn Las Vegas, LLC 6.625%, 12/01/14 75,620 --------------- 24,058,154 --------------- CONSUMER STAPLES (1.1%) 95,000 Alimentation Couche-Tard, Inc. 7.500%, 12/15/13 97,138 282,000 Central Garden & Pet Company 9.125%, 02/01/13 295,395 477,000 Chattem, Inc. 7.000%, 03/01/14 473,423 382,000 Chiquita Brands International, Inc.< 8.875%, 12/01/15 362,900 592,000 Del Monte Foods Company 8.625%, 12/15/12 627,520 1,194,000 Dole Food Company, Inc.< 8.875%, 03/15/11 1,194,000 1,146,000 Jean Coutu Group, Inc. 8.500%, 08/01/14 1,197,570 334,000 NBTY, Inc. 7.125%, 10/01/15 334,835 Pilgrim's Pride Corp. 363,000 8.375%, 05/01/17< 359,370 162,000 7.625%, 05/01/15 161,190 573,000 Pinnacle Foods Holding< 8.250%, 12/01/13 588,757 535,000 Playtex Products, Inc. 8.000%, 03/01/11 562,419 Reynolds American, Inc. 525,000 7.300%, 07/15/15 546,838 286,000 7.625%, 06/01/16 304,010 955,000 Smithfield Foods, Inc. 7.750%, 05/15/13 976,487 286,000 SUPERVALU, Inc. 7.500%, 11/15/14 299,430 --------------- 8,381,282 --------------- ENERGY (1.2%) 664,000 Arch Western Finance, LLC 6.750%, 07/01/13 659,020 859,000 Chesapeake Energy Corp. 7.500%, 06/15/14 887,991 621,000 Comstock Resources, Inc. 6.875%, 03/01/12 598,489 64,000 Energy Partners, Ltd. 8.750%, 08/01/10 65,280 286,000 Forest Oil Corp. 8.000%, 12/15/11 298,155 446,000 Giant Industries, Inc. 11.000%, 05/15/12 477,220 239,000 Hanover Compressor Company 9.000%, 06/01/14 255,730 191,000 Mariner Energy, Inc. 7.500%, 04/15/13 186,225 535,000 Petrohawk Energy Corp. 7.125%, 04/01/12 513,600 1,079,000 Petroleo Brasileiro, SA< 8.375%, 12/10/18 1,279,694 PRINCIPAL AMOUNT VALUE ------------ --------------- Premcor Refining Group, Inc. $ 611,000 9.500%, 02/01/13 $ 657,744 260,000 7.500%, 06/15/15 266,946 286,000 Range Resources Corp. 7.375%, 07/15/13 291,720 334,000 Superior Energy Services, Inc. 6.875%, 06/01/14 328,990 668,000 Swift Energy Company< 9.375%, 05/01/12 704,740 477,000 Whiting Petroleum Corp.< 7.250%, 05/01/13 475,808 Williams Companies, Inc. 955,000 7.750%, 06/15/31 1,007,525 191,000 7.500%, 01/15/31 199,595 --------------- 9,154,472 --------------- FINANCIALS (0.3%) E*TRADE Financial Corp. 630,000 7.375%, 09/15/13 656,775 430,000 7.875%, 12/01/15< 462,250 115,000 8.000%, 06/15/11 120,606 716,000 Leucadia National Corp. 7.000%, 08/15/13 721,370 162,000 Omega Healthcare Investors, Inc. 7.000%, 04/01/14 162,810 240,000 Senior Housing Properties Trust 7.875%, 04/15/15 249,600 --------------- 2,373,411 --------------- HEALTH CARE (0.5%) 392,000 Ameripath, Inc.< 10.500%, 04/01/13 427,280 382,000 Angiotech Pharmaceuticals, Inc. 7.750%, 04/01/14 353,350 807,000 Bausch & Lomb, Inc. 7.125%, 08/01/28 811,412 162,000 Bio-Rad Laboratories, Inc. 7.500%, 08/15/13 168,480 191,000 Biovail Corp. 7.875%, 04/01/10 196,014 72,000 DaVita, Inc. 7.250%, 03/15/15 73,260 57,000 Omnicare, Inc.< 6.875%, 12/15/15 56,572 430,000 Psychiatric Solutions, Inc. 7.750%, 07/15/15 431,075 812,000 Tenet Healthcare Corp.< 9.250%, 02/01/15 814,030 430,000 Valeant Pharmaceuticals International 7.000%, 12/15/11 414,950 621,000 Vanguard Health Systems, Inc.< 9.000%, 10/01/14 638,854 --------------- 4,385,277 --------------- INDUSTRIALS (0.5%) 239,000 Armor Holdings, Inc. 8.250%, 08/15/13 250,950 95,000 FTI Consulting, Inc.< 7.625%, 06/15/13 97,731 See accompanying Notes to Schedule of Investments 5 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) PRINCIPAL AMOUNT VALUE ------------ --------------- $ 286,000 Gardner Denver, Inc. 8.000%, 05/01/13 $ 299,585 286,000 GATX Corp.< 8.875%, 06/01/09 305,740 621,000 General Cable Corp.< 9.500%, 11/15/10 658,260 122,000 Global Cash Access, Inc. 8.750%, 03/15/12 128,100 153,000 H&E Equipment Service, Inc. 8.375%, 07/15/16 162,563 IKON Office Solutions, Inc. 191,000 7.750%, 09/15/15 201,982 191,000 6.750%, 12/01/25 168,481 143,000 Sequa Corp. 8.875%, 04/01/08 147,648 668,000 Terex Corp. 7.375%, 01/15/14 684,700 191,000 Trinity Industries, Inc. 6.500%, 03/15/14 188,613 332,000 WESCO International, Inc. 7.500%, 10/15/17 335,320 191,000 Williams Scotsman International, Inc. 8.500%, 10/01/15 199,595 --------------- 3,829,268 --------------- INFORMATION TECHNOLOGY (0.5%) 557,000 Advanced Micro Devices, Inc. 7.750%, 11/01/12 570,925 67,000 Anixter International, Inc. 5.950%, 03/01/15 63,734 67,000 Avago Technologies*< 11.875%, 12/01/15 73,700 382,000 Celestica, Inc.< 7.875%, 07/01/11 375,315 477,000 Flextronics International, Ltd.< 6.500%, 05/15/13 465,075 549,000 Freescale Semiconductor, Inc.* 8.875%, 12/15/14 549,000 36,000 Sanmina-SCI Corp. 8.125%, 03/01/16 34,470 654,000 SunGard Data Systems, Inc. 9.125%, 08/15/13 691,605 Xerox Corp. 907,000 8.000%, 02/01/27< 929,675 668,000 7.625%, 06/15/13 698,060 --------------- 4,451,559 --------------- MATERIALS (0.7%) 95,000 Agrium, Inc. 7.125%, 05/23/36 100,013 95,000 Crown Holdings, Inc. 7.750%, 11/15/15 98,800 477,000 Equistar Chemicals, LP 10.625%, 05/01/11 508,005 76,000 Gibraltar Industries, Inc. 8.000%, 12/01/15 75,240 Ineos Group Holdings, PLC* 458,000 EUR 7.875%, 02/15/16 564,103 PRINCIPAL AMOUNT VALUE ------------ --------------- $ 95,000 8.500%, 02/15/16< $ 91,438 712,000 IPSCO, Inc. 8.750%, 06/01/13 767,180 382,000 Neenah Paper, Inc. 7.375%, 11/15/14 369,585 764,000 Sealed Air Corp.* 6.875%, 07/15/33 761,188 365,000 Terra Industries, Inc.*+ 7.000%, 02/01/17 361,350 191,000 Texas Industries, Inc. 7.250%, 07/15/13 196,252 477,000 The Mosaic Company* 7.625%, 12/01/16 490,117 Union Carbide Corp. 382,000 7.500%, 06/01/25 394,431 296,000 7.875%, 04/01/23 317,067 306,000 Westlake Chemical Corp. 6.625%, 01/15/16 301,410 --------------- 5,396,179 --------------- TELECOMMUNICATION SERVICES (0.4%) 286,000 CenturyTel, Inc. 6.875%, 01/15/28 277,509 57,000 Citizens Communications Company 9.000%, 08/15/31 61,702 191,000 iPCS, Inc. 11.500%, 05/01/12 212,010 286,000 Leap Wireless International, Inc.*< 9.375%, 11/01/14 301,730 286,000 Qwest Communications International, Inc.< 7.750%, 02/15/31 286,000 358,000 CAD Rogers Communications, Inc. 7.250%, 12/15/11 332,288 430,000 CAD Rogers Wireless, Inc. 7.625%, 12/15/11 406,326 955,000 Sprint Nextel Corp. 7.375%, 08/01/15 979,663 382,000 Syniverse Technologies, Inc. 7.750%, 08/15/13 384,865 --------------- 3,242,093 --------------- UTILITIES (0.1%) 119,000 Edison International 7.730%, 06/15/09 123,165 95,000 NRG Energy, Inc. 7.250%, 02/01/14 95,475 573,000 TXU Corp. 6.500%, 11/15/24 533,488 --------------- 752,128 --------------- TOTAL CORPORATE BONDS 66,023,823 --------------- See accompanying Notes to Schedule of Investments 6 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) NUMBER OF CONTRACTS VALUE ------------ --------------- OPTIONS (1.5%) CONSUMER DISCRETIONARY (0.3%) 725 Comcast Corp.# Call, 01/17/09, Strike $42.50 $ 663,375 200 Garmin, Ltd.# Call, 01/19/08, Strike $50.00 149,000 470 Harley-Davidson, Inc.# Call, 01/17/09, Strike $70.00 493,500 Nike, Inc.# 180 Call, 01/17/09, Strike $100.00 238,500 180 Call, 01/17/09, Strike $90.00 342,900 260 Office Depot, Inc.# Call, 01/19/08, Strike $40.00 94,900 350 Omnicom Group, Inc.# Call, 01/17/09, Strike $100.00 633,500 --------------- 2,615,675 --------------- CONSUMER STAPLES (0.1%) 820 Coca-Cola Company# Call, 01/17/09, Strike $45.00 524,800 375 Kroger Company# Call, 01/17/09, Strike $25.00 159,375 215 PepsiCo, Inc.# Call, 01/19/08, Strike $60.00 176,300 --------------- 860,475 --------------- FINANCIALS (0.3%) 460 A.G. Edwards, Inc.# Call, 01/17/09, Strike $70.00 395,600 750 Bank of America Corp.# Call, 01/17/09, Strike $50.00 528,750 15 Chicago Mercantile Exchange Holdings, Inc.# Call, 01/19/08, Strike $510.00 152,475 Goldman Sachs Group, Inc.# 85 Call, 01/17/09, Strike $195.00 411,825 60 Call, 01/19/08, Strike $190.00 234,600 120 Lehman Brothers Holdings, Inc.# Call, 01/19/08, Strike $75.00 173,400 130 Merrill Lynch & Company, Inc.# Call, 01/19/08, Strike $85.00 193,050 --------------- 2,089,700 --------------- HEALTH CARE (0.1%) 75 Allergan, Inc.# Call, 01/19/08, Strike $110.00 130,500 650 Johnson & Johnson# Call, 01/17/09, Strike $65.00 529,750 --------------- 660,250 --------------- INDUSTRIALS (0.1%) 460 General Dynamics Corp.# Call, 01/17/09, Strike $75.00 627,900 --------------- INFORMATION TECHNOLOGY (0.6%) 70 Apple Computer, Inc.# Call, 01/19/08, Strike $90.00 88,900 960 Cisco Systems, Inc.# Call, 01/17/09, Strike $27.50 470,400 280 Hewlett-Packard Company# Call, 01/19/08, Strike $40.00 198,800 NUMBER OF CONTRACTS VALUE ------------ --------------- 500 Infosys Technologies, Ltd.# Call, 01/17/09, Strike $55.00 $ 680,000 250 Intuit, Inc.# Call, 01/19/08, Strike $35.00 60,625 1,300 Microsoft Corp.# Call, 01/17/09, Strike $30.00 637,000 275 Motorola, Inc.# Call, 01/19/08, Strike $22.50 37,812 Nokia Corp.# 1,900 Call, 01/19/08, Strike $20.00 684,000 1,900 Call, 01/19/08, Strike $17.50 1,026,000 200 NVIDIA Corp.# Call, 01/19/08, Strike $40.00 49,000 1,600 Oracle Corp.# Call, 01/17/09, Strike $17.50 520,000 --------------- 4,452,537 --------------- TELECOMMUNICATION SERVICES (0.0%) 190 America Movil, S.A. de C.V.# Call, 01/19/08, Strike $40.00 171,000 130 NII Holdings, Inc.# Call, 01/19/08, Strike $70.00 176,150 --------------- 347,150 --------------- TOTAL OPTIONS 11,653,687 --------------- TOTAL SYNTHETIC CONVERTIBLE SECURITIES (Cost $75,387,553) 77,677,510 --------------- NUMBER OF SHARES VALUE ------------ --------------- CONVERTIBLE PREFERRED STOCKS (34.0%) CONSUMER DISCRETIONARY (2.9%) 610,000 Ford Motor Company Capital Trust II 6.500% 22,490,700 --------------- CONSUMER STAPLES (0.8%) 5,000 Universal Corp. 6.750% 6,070,000 --------------- ENERGY (1.6%) 50,000 Chesapeake Energy Corp. 6.250% 12,753,750 --------------- FINANCIALS (22.0%) 525,000 Citigroup, Inc. (Genworth Financial, Inc.)< ++ & 5.020% 17,272,500 16,000 Fortis Insurance, N.V. (Assurant, Inc.)*& 7.750% 22,689,600 240,000 Lazard, Ltd. 6.625% 10,466,400 850,000 Lehman Brothers Holdings, Inc. (General Mills, Inc.)& 6.250% 23,264,500 190,000 Merrill Lynch & Co., Inc. (Nuveen Investments, Inc.)& 6.750% 8,455,000 See accompanying Notes to Schedule of Investments 7 CALAMOS CONVERTIBLE OPPORTUNITIES AND INCOME FUND SCHEDULE OF INVESTMENTS JANUARY 31, 2007 (UNAUDITED) NUMBER OF SHARES VALUE ------------ --------------- 785,000 Metlife, Inc. 6.375% $ 24,664,700 650,000 National Australia Bank, Ltd. 7.875% 33,280,000 55,000 Reinsurance Group of America, Inc. 5.750% 3,985,300 130,000 CHF Swiss Re 6.000% 10,780,075 310,000 Washington Mutual, Inc. 5.375% 17,174,000 --------------- 172,032,075 --------------- HEALTH CARE (1.6%) 215,000 Schering-Plough Corp. 6.000% 12,663,500 --------------- UTILITIES (5.1%) 410,000 AES Corp. Trust III 6.750% 19,593,900 435,000 CenterPoint Energy, Inc. (Time Warner, Inc.)++& 2.000% 16,801,875 65,000 Southern Union Company 5.000% 3,442,725 --------------- 39,838,500 --------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $225,483,032) 265,848,525 --------------- WARRANTS (0.1%) CONSUMER DISCRETIONARY (0.1%) 100,000 Expedia, Inc.# 05/07/12, Strike $24.46 262,500 100,000 IAC/InterActiveCorp# 05/07/12, Strike $30.54 787,500 --------------- 1,050,000 --------------- TOTAL WARRANTS (Cost $831,500) 1,050,000 --------------- PRINCIPAL AMOUNT VALUE ------------ --------------- SHORT-TERM INVESTMENT (2.9%) COMMERCIAL PAPER (2.9%) $ 22,741,000 Citigroup, Inc. 5.210%, 02/01/07 (Cost $22,741,000) 22,741,000 --------------- NUMBER OF SHARES VALUE ------------ --------------- INVESTMENTS OF CASH COLLATERAL FOR SECURITIES ON LOAN (19.4%) 151,986,000 Bank of New York Institutional Cash Reserve Fund current rate 5.384% (Cost $151,986,000) 151,986,000 --------------- TOTAL INVESTMENTS (166.0%) (Cost $1,223,778,695) 1,299,376,619 --------------- PAYABLE UPON RETURN OF SECURITIES ON LOAN (-19.4%) (151,986,000) --------------- OTHER ASSETS, LESS LIABILITIES (2.5%) 20,213,225 --------------- PREFERRED SHARES AT REDEMPTION VALUE INCLUDING DIVIDENDS PAYABLE (-49.1%) (384,694,301) --------------- NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS (100.0%) $ 782,909,543 --------------- NOTES TO SCHEDULE OF INVESTMENTS Note: Market Value for Securities denominated in foreign currencies are shown in U.S. dollars. * 144A securities are those that are exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities are generally issued to qualified institutional buyers ("QIBs"), such as the Fund. Any resale of these securities must generally be effected through a sale that is exempt from registration (e.g. a sale to another QIB), or the security must be registered for public sale. At January 31, 2007, the market value of 144A securities that were not subject to mandatory issuer registration obligations is $86,825,441 or 11.1% of net assets. + Security was purchased on when issued basis. < Security, or portion of security, is on loan. # Non-income producing security. ++ Variable rate or step bond security. The interest rate shown is the rate in effect at January 31, 2007. & Securities exchangeable or convertible into securities of an entity different than the issuer. Such entity is identified in the parenthetical. FOREIGN CURRENCY ABBREVIATIONS CAD Canadian Dollar CHF Swiss Franc EUR European Monetary Unit GBP British Pound Sterling See accompanying Notes to Schedule of Investments 8 NOTES TO SCHEDULE OF INVESTMENTS (unaudited) NOTE 1 - ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES ORGANIZATION. CALAMOS Convertible Opportunities and Income Fund (the "Fund") was organized as a Delaware statutory trust on April 17, 2002 and is registered under the Investment Company Act of 1940 (the "1940 Act") as a diversified, closed-end management investment company. The Fund commenced operations on June 26, 2002. The Fund's investment objective is to provide total return through a combination of capital appreciation and current income. Under normal circumstances, the Fund will invest at least 80% of its managed assets in a diversified portfolio of convertible and non-convertible income securities. "Managed assets" means the Fund's total assets (including any assets attributable to any leverage that may be outstanding) minus total liabilities (other than debt representing financial leverage). PORTFOLIO VALUATION. The valuation of the Fund's portfolio securities is in accordance with policies and procedures adopted by and under the ultimate supervision of the Board of Trustees. Portfolio securities that are traded on U.S. securities exchanges, except option securities, are valued at the last current reported sales price at the time as of which the Fund determines its NAV. Securities traded in the over-the-counter ("OTC") market and quoted on The Nasdaq Stock Market are valued at the Nasdaq Official Closing Price ("NOCP"), as determined by Nasdaq, or lacking a NOCP, the last current reported sale price on Nasdaq at the time as of which the Fund determines its NAV. When a most recent last sale or closing price is not available, portfolio securities, other than option securities, that are traded on a U.S. securities exchange and other securities traded in the OTC market are valued at the mean between the most recent bid and asked quotations in accordance with guidelines adopted by the Board of Trustees. Each option security traded on a U.S. securities exchange is valued at the mid-point of the consolidated bid/ask quote for the option security, also in accordance with guidelines adopted by the Board of Trustees. Each OTC option that is not traded through the Options Clearing Corporation is valued by the counterparty to such option. If the pricing committee determines that the valuation of a security in accordance with the methods described above is not reflective of a fair value for such security, the security, including any thinly-traded security, junk bond or synthetic convertible instrument, is valued at a fair value by the pricing committee, under the ultimate supervision of the Board of Trustees, following the guidelines and/or procedures adopted by the Board of Trustees. Trading in securities on European and Far Eastern securities exchanges and OTC markets is typically completed at various times before the close of business on each day on which the NYSE is open. Each security trading on these exchanges or OTC markets is evaluated utilizing a systematic fair valuation model provided by an independent pricing service approved by the Board of Trustees. The valuation of each security that meets certain criteria in relation to the valuation model is systematically adjusted to reflect the impact of movement in the U.S. market after the foreign markets close. Securities that do not meet the criteria, or that are principally traded in other foreign markets, are valued as of the last current sale price at the time as of which the Fund determines its NAV, or when reliable market prices or quotations are not readily available, at the mean between the most recent bid and asked quotations as of the close of the appropriate exchange or other designated time, in accordance with guidelines adopted by the Board of Trustees. Trading of foreign securities may not take place on every NYSE business day. In addition, trading may take place in various foreign markets on Saturdays or on other days when the NYSE is not open and on which the Fund's NAV is not calculated. As stated above, if the market prices are not readily available or are not reflective of a security's fair value, the security is valued at a fair value by the pricing committee, under the ultimate 9 NOTES TO SCHEDULE OF INVESTMENTS (unaudited) supervision of the Board of Trustees, following the guidelines and/or procedures adopted by the Board of Trustees. The Fund also may use fair value pricing, pursuant to Board of Trustees guidelines and under the ultimate supervision of the Board of Trustees if the value of a foreign security it holds is materially affected by events occurring before their pricing time but after the close of the primary market or exchange on which the security is traded. Those procedures may utilize valuations furnished by pricing services approved by the Board of Trustees, which may be based on market transactions for comparable securities and various relationships between securities that are generally recognized by institutional traders, a computerized matrix system, or appraisals derived from information concerning the securities or similar securities received from recognized dealers in those securities. When fair value pricing of securities is employed, the prices of securities used by the Fund to calculate its NAV may differ from market quotations or official closing prices. INVESTMENT TRANSACTIONS. Short-term and long-term investment transactions are recorded on a trade date basis on January 31, 2007. FOREIGN CURRENCY TRANSLATION. Values of investments and other assets and liabilities denominated in foreign currencies are translated into U.S. dollars using a rate quoted by a major bank or dealer in the particular currency market, as reported by a recognized quotation dissemination service. OPTION TRANSACTIONS. For hedging and investment purposes, the Fund may purchase or write (sell) put and call options. One of the risks associated with purchasing an option is that the Fund pays a premium whether or not the option is exercised. Additionally, the Fund bears the risk of loss of premium and change in market value should the counterparty not perform under the contract. Put and call options purchased are accounted for in the same manner as portfolio securities. The cost of securities acquired through the exercise of purchased call options is increased by premiums paid. The proceeds from securities sold through the exercise of purchased put options are decreased by the premiums paid. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from written options. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a written call option is exercised, the premium is added to the proceeds from the sale of the underlying security or currency in determining whether the Fund has realized a gain or loss. If a written put option is exercised, the premium reduces the cost basis of the securities purchased by the Fund. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. NOTE 2 - INVESTMENTS The following information is presented on a Federal income tax basis as of January 31, 2007. Differences between the cost basis under U.S. generally accepted accounting principles and Federal income tax purposes are primarily due to timing differences. 10 NOTES TO SCHEDULE OF INVESTMENTS (unaudited) Cost basis of investments $1,235,360,012 -------------- Gross unrealized appreciation 78,616,932 Gross unrealized depreciation (14,600,325) -------------- Net unrealized appreciation (depreciation) $ 64,016,607 -------------- NOTE 3 - FORWARD FOREIGN CURRENCY CONTRACTS There were no open forward foreign currency contracts at January 31, 2007. NOTE 4 - SYNTHETIC CONVERTIBLE SECURITIES The Fund may establish a "synthetic" convertible instrument by combining separate securities that possess the economic characteristics similar to a convertible security, i.e., fixed-income securities ("fixed-income component", which may be a convertible or non-convertible security) and the right to acquire equity securities ("convertible component"). The fixed-income component is achieved by investing in fixed income securities such as bonds, preferred stocks and money market instruments. The convertible component is achieved by investing in warrants or options to buy common stock at a certain exercise price, or options on a stock index. In establishing a synthetic instrument, the Fund may pool a basket of fixed-income securities and a basket of warrants or options that produce the economic characteristics similar to a convertible security. Within each basket of fixed-income securities and warrants or options, different companies may issue the fixed-income and convertible components, which may be purchased separately and at different times. The Fund may purchase synthetic convertible instruments created by other parties, typically investment banks, including convertible structured notes. Convertible structured notes are fixed-income debentures linked to equity. Convertible structured notes have the attributes of a convertible security; however, the investment bank that issued the convertible note assumes the credit risk associated with the investment, rather than the issuer of the underlying common stock into which the note is convertible. Purchasing synthetic convertible securities may offer more flexibility than purchasing a convertible security. NOTE 5 - PREFERRED SHARES There are unlimited shares of Auction Rate Cumulative Preferred Shares ("Preferred Shares") authorized. The Preferred Shares have rights as determined by the Board of Trustees. The 15,360 shares of Preferred Shares outstanding consist of seven series, 2,040 shares of M, 2,040 shares of TU, 2,040 shares of W7, 2,400 shares of W28, 2,400 shares of TH7, 2,040 shares of TH28, and 2,400 shares of F. The Preferred Shares have a liquidation value of $25,000 per share plus any accumulated but unpaid dividends, whether or not declared. NOTE 6 - INTEREST RATE TRANSACTIONS Swap agreements are stated at fair value. The contracts are marked-to-market daily based on dealer-supplied valuations and changes in value are recorded as unrealized appreciation (depreciation). Details of the interest rate swap agreements outstanding as of January 31, 2007 were as follows: 11 NOTES TO SCHEDULE OF INVESTMENTS (unaudited) Unrealized Termination Notional Fixed Rate Floating Rate Appreciation Counterparty Date Amount (000) (Fund Pays) (Fund Receives) (Depreciation) ------------- ----------------- ------------ ----------- --------------- ------------- Merrill Lynch July 3, 2007 65,000 2.33% 1 month LIBOR 968,576 Merrill Lynch November 28, 2007 60,000 3.26% 1 month LIBOR 1,012,223 Merrill Lynch July 3, 2008 70,000 2.69% 1 month LIBOR 2,617,412 Merrill Lynch November 28, 2008 60,000 3.60% 1 month LIBOR 1,683,339 ---------- $6,281,550 ========== NOTE 7 - SECURITIES LENDING For the three-month period ended January 31, 2007, the Fund loaned certain of its securities to broker-dealers and banks. Any such loan must be continuously secured by collateral in cash or cash equivalents maintained on a current basis in an amount at least equal to the market value of the securities loaned by the Fund. The Fund continues to receive the equivalent of the interest or dividends paid by the issuer on the securities loaned and also receives an additional return that may be in the form of a fixed fee or a percentage of the collateral. The Fund may pay reasonable fees to persons unaffiliated with the Fund for services in arranging these loans. The Fund has the right to call the loan and obtain the securities loaned at any time on notice of not more than five business days. The Fund does not have the right to vote the securities during the existence of the loan but could call the loan in an attempt to permit voting of the securities in certain circumstances. Upon return of the securities loaned, the cash or cash equivalent collateral will be returned to the borrower. In the event of bankruptcy or other default of the borrower, the Fund could experience both delays in liquidating the loan collateral or recovering the loaned securities and losses, including (a) possible decline in the value of the collateral or in the value of the securities loaned during the period while the Fund seeks to enforce its rights thereto, (b) possible subnormal levels of income and lack of access to income during this period, and (c) the expenses of enforcing its rights. In an effort to reduce these risks, the Fund's securities lending agent monitors, and reports to Calamos Advisors on, the creditworthiness of the firms to which a Fund lends securities. At January 31, 2007, the Fund had securities valued at $146,071,683 that were on loan to broker-dealers and banks and $151,986,000 in cash or cash equivalent collateral. 12 ITEM 2. CONTROLS AND PROCEDURES. a) The registrant's principal executive officer and principal financial officer have evaluated the registrant's disclosure controls and procedures within 90 days of this filing and have concluded that the registrant's disclosure controls and procedures were effective, as of that date, in ensuring that information required to be disclosed by the registrant in this Form N-Q was recorded, processed, summarized, and reported timely. b) There were no changes in the registrant's internal controls over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) that occurred during the registrant's last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 3. EXHIBITS. (a) Certification of Principal Executive Officer. (b) Certification of Principal Financial Officer. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Calamos Convertible Opportunities and Income Fund By: /s/ John P. Calamos, Sr. --------------------------------- Name: John P. Calamos, Sr. Title: Principal Executive Officer Date: March 28, 2007 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the dates indicated. Calamos Convertible Opportunities and Income Fund By: /s/ John P. Calamos, Sr. --------------------------------- Name: John P. Calamos, Sr. Title: Principal Executive Officer Date: March 28, 2007 By: /s/ Patrick H. Dudasik --------------------------------- Name: Patrick H. Dudasik Title: Principal Financial Officer Date: March 28, 2007