Nvidia and other U.S. AI stocks rebounded Tuesday after Monday’s DeepSeek-driven sell-off. Nvidia shares rose 9% but were still below Friday’s close.  Analysts at Bernstein, Citi, Wedbush, and others suggested Monday’s sell-off was overblown, presenting a buying opportunity. ProShares strategist Simeon Hyman cautioned about tech valuations and uncertainties. Morgan Stanley analysts warned that the market’s reaction could spur new export controls or dampen spending enthusiasm. Morgan Stanley maintained “overweight” ratings for Nvidia and Broadcom but lowered Nvidia’s price target.