Check out the companies making headlines this week:

C3.ai (NYSE: AI): Enterprise AI software company C3.ai (NYSE: AI) fell by 5.3% on Tuesday after the stock was caught in a broader sell-off among artificial intelligence (AI) stocks amid growing investor concern that the sector's recent boom might be an unsustainable bubble. See our full article here.

Is now the time to buy C3.ai? Access our full analysis report here.

Carvana (NYSE: CVNA): Online used car dealer Carvana (NYSE: CVNA) fell by 3.7% on Tuesday after the company's recent earnings report sparked fears about its future performance, despite strong results. See our full article here.

Is now the time to buy Carvana? Access our full analysis report here.

GEO Group (NYSE: GEO): Private corrections company GEO Group (NYSE: GEO) fell by 11.1% on Thursday after it reported strong third-quarter results but issued a disappointing forecast for the fourth quarter. See our full article here.

Is now the time to buy GEO Group? Access our full analysis report here.

Kadant (NYSE: KAI): Industrial equipment manufacturer Kadant (NYSE: KAI) fell by 2.4% on Tuesday after the company reported mixed third-quarter results, with a weak forecast for the upcoming quarter overshadowing beats on revenue and earnings. See our full article here.

Is now the time to buy Kadant? Access our full analysis report here.

Comcast (NASDAQ: CMCSA): Telecommunications and media company Comcast (NASDAQ: CMCSA) fell by 3% on Monday after a series of analyst price target reductions and a recent ratings downgrade driven by concerns over its broadband business. See our full article here.

Is now the time to buy Comcast? Access our full analysis report here.