Jim Cramer: 18 stock picks worth owning over the S&amp;P 500 https://t.co/1v4dJxdcmZ $DPZ $NVDA $AMD $NFLX $AMZN $ROKU $ATVI $TTWO $STZ $WMT $DG $COST $CAG $CPB $MCK $PEP $MDLZ $ZM @jimcramer @cnbc @madmoneyoncnbc