U.S. stocks opened lower, with the Dow Jones Industrial Average down 0.1%, the S&P 500 up 0.13%, and the Nasdaq Composite up 0.32%. Mining stocks opened higher, with Cordell Minerals (CDE.N) up 8.2% and Pan American Silver (PAAS.O) up 6.2%, while PayPal (PYPL.O) plunged 18% after the company warned of a potential decline in profits this year and announced a change in CEO.