The day-to-day volatility for the S&P 500 settled down on Monday and Tuesday. But two-thirds of stocks in the U.S. large-cap benchmark index have declined this year, with 220 of the 500 stocks down at least 10% and 82 down at least 20%.

Tesla stock fell slightly Thursday. It was another tough week for investors. First-quarter earnings are due in a few days. After that, investors should start thinking about China. The stock fell 17 cents,

Most U.S. stocks are climbing Thursday, but the worst drop for UnitedHealth Group in a quarter of a century is keeping Wall Street in check. The S&P 500 was 0.5% higher in late trading, as 6 out of every 7 stocks within the index climbed in the final day of trading for a holiday-shortened week.