$NKLA Nikola Option Alert: Jul 17 $50 Calls at the Bid: 500 @ $14.2 vs 10150 OI; Ref=$64.06 [6/18/2020, 5:15:11 AM] [+$500k Sweeps Above Midpoint] Other Sweeps on: $GSX $VALE $AAPL $NVDA $GDX $ZS $SYF $LK $NIO $SBUX $EFA $EEM