Smaller AI-focused names joined the rally as well. For instance, enterprise AI software maker C3.ai saw its shares gain about 3.4% on Monday stockinvest.us, bouncing off recent lows. The company has been recovering from leadership turmoil – founder CEO Tom Siebel announced plans to step down due to health issues in late July – and investors are speculating that fresh leadership could reinvigorate C3.ai's growth. Across the board, from mega-caps to niche players, "AI" was the magic word lifting stock prices to start the week.