The stock market selloff accelerated on Monday as the Nasdaq Composite marked its worst day since 2022. The Roundhill Magnificent Seven ETF, which includes all seven of the megacap tech stocks, closed in bear market territory after falling more than 20% from its high in December. Wall Street fled risky stocks in favor of safety after President Donald Trump didn’t back down from his unpredictable wielding of tariffs that has sowed uncertainty in markets and led investors to demand lower earnings multiples from large tech firms.