Key Takeaways Major U.S. equities indexes climbed Monday afternoon, boosted by gains in the tech sector as Nvidia announced a big investment in ChatGPT maker OpenAI. Apple shares rose after Wedbush raised its price target for the stock, pointing to better-than-expected demand for the iPhone 17. Nvidia led gains on the Dow, and was among the day's best-performing stocks on the Nasdaq and S&P 500. Shares of several Nvidia partners such as Super Micro Computer (SMCI) and Micron Technology (MU) also rose. Apple (AAPL) shares surged as Wedbush lifted its price target for the tech giant's stock to a new Street high of $310 from $270 on signs of better-than-expected demand for the iPhone 17.