U.S. stock markets opened higher today, driven by a rebound in artificial intelligence (AI) stocks following a recent sell-off. The Nasdaq and S&P 500 saw notable gains as investors bought the dip in AI trades, while technology stocks rallied in anticipation of a busy earnings week. Despite the overall positive trend, the Dow Jones experienced a decline as investors shifted their focus away from tech stocks. European markets, on the other hand, faced challenges due to ongoing protests. Analysts are cautiously optimistic, noting that the real test for the market will come with the upcoming corporate earnings reports, especially in the semiconductor sector.