U.S. stocks opened higher, Moderna fell 7.1%

According to Gate market data, U.S. stocks opened with the Dow Jones up 0.2%, the S&P 500 index up 0.3%, and the Nasdaq up 0.4%. Moderna fell 7.1% after Citigroup downgraded its rating from "Neutral" to "Sell." Robinhood rose 5.4% after launching 24-hour weekend trading services for U.S. stocks. Boeing rose 2.3% after winning the U.S. Navy's next-generation fighter jet contract.