The stock market plummeted last week on fears of a recession. The S&P 500 tumbled more than 3% as investors fled former high-flying stocks. While the benchmark index did claw back all the losses to essentially breakeven by the end of the week, such wild swings could be a sign of a new, more sustained collapse.The best S&P 500 stocks during the recent market turmoil were not the same ones that brought the index to its all-time highs. Nvidia (NASDAQ:NVDA) is still down 2.5% from last week, Microsoft (NASDAQ:M ...