Why Monolithic Power Systems (MPWR) stock is in focus ahead of Tuesday’s reopen
New York, January 19, 2026, 19:42 EST — Market closed Shares of Monolithic Power Systems, Inc. (MPWR) climbed 2.3% to close at $1,033.17 on Friday, marking their fifth straight day of gains ahead of the long weekend. U.S. markets, including the Nasdaq and NYSE, will be closed on Monday for Martin Luther King Jr. Day, with trading picking back up on Tuesday. (MarketWatch) Futures plunged immediately. S&P 500 and Nasdaq contracts dropped over 1.2% Monday following U.S. President Donald Trump’s threat of new tariffs targeting several European nations, driving investors to safer bets. “There is obviously a response (in financial