$SPY SPDR S&amp;P 500 Option Alert: Sep 18 $305 Puts at the Ask: 308 @ $17.211 vs 23544 OI; Ref=$302.9907 [6/29/2020, 9:59:31 AM] [+$500k Sweeps Above Midpoint] Other Sweeps on: $LOW $V $ZM $BLMN $PLUG $IFF $AR $TWOU $ABB $PYPL $CHWY $ET