US stock markets experienced a choppy trading session with the S&P 500 and Nasdaq closing at record highs despite mixed investor reactions to a newly sealed EU trade deal. While some indexes, including the Dow, slipped, investor optimism surrounding upcoming earnings from major companies and a Federal Reserve meeting added a layer of complexity to the trading environment. The S&P 500 managed to close little changed, reflecting a market that is carefully digesting the implications of the trade agreement against the backdrop of critical earnings reports expected this week. Meanwhile, notable performances from stocks like Tesla and Supermicro were observed, illustrating the mixed sentiment prevailing on Wall Street as traders brace for a busy economic week ahead.