The S&P 500 and the Nasdaq suffered their biggest one-day percentage drop since October 10. Tech shares weighed particularly heavily on the Nasdaq, with six of the "Magnificent Seven" AI-related momentum stocks losing ground on the day. The Philadelphia SE Semiconductor index dipped 4.0%. "A lot of these companies' valuations were pretty stretched and their earnings were good, but not great," Carlson added. "And that's a recipe for profit-taking." The U.S. government shutdown, the result of a congressiona ...