Nvidia is investing in OpenAI. (Photo by Justin Sullivan/Getty Images)Getty ImagesKey TakeawaysPowell’s Cautious Remarks Shift Focus Toward Upcoming Inflation DataNvidia’s Massive AI Investments Drive Market Cap And Sector MomentumLithium Americas Surges On Potential Government Stake And EV DemandMajor market indices fell on Tuesday with the S&P 500 dropping 0.55% and Nasdaq Composite falling 0.95%. The Dow Jones Industrial Average and Russell 2000 fell by 0.19% and 0.24%, respectively. After celebrating la ...