[The three major U.S. stock indexes closed lower, Coinbase dropped over 7%] U.S. stocks closed weak on Monday, with the Dow Jones Industrial Average preliminarily down 1.2%, the S&P 500 down 0.9%, and the Nasdaq Composite down 0.84%. Google (GOOG.O) rose 3% due to Buffett's investment, while Apple (AAPL.O) and Nvidia (NVDA.O) both fell nearly 2%. Cryptocurrency trading platform Coinbase (COIN.O) saw its stock price drop 7.06%.