$SPY SPDR S&amp;P 500 Option Alert: Sep 18 $300 Puts at the Bid: 1000 @ $12.991 vs 72925 OI; Ref=$310.34 [6/4/2020, 2:42:32 PM] [+$500k Sweeps Above Midpoint] Other Sweeps on: $GE $USO $RIOT $PG $PPL $PCG $SRNE $NRZ $EWZ $PTON $BIG $WDC