U.S. stocks opened higher, with the Dow Jones Industrial Average up 0.36%, the S&P 500 up 0.4%, and the Nasdaq Composite up 0.3%. SanDisk (SNDK.O) fell 2.7% and Western Digital (WDC.O) fell 6%, as the market perceived their earnings guidance as less than impressive. ExxonMobil (XOM.N) and Chevron (CVX.N) fell 1.1% and 1.2%, respectively. Apple (AAPL.O) rose 2.7%.