$SPY SPDR S&amp;P 500 Option Alert: Aug 21 $310 Puts Sweep (30) near the Ask: 532 @ $15.5 vs 22962 OI; Ref=$303.54 [6/29/2020, 7:29:30 AM] [+$500k Sweeps Above Midpoint] Other Sweeps on: $CC $BGCP $SAFM $KSS $MGM $GLUU $COG $SLB $UPRO $ERJ $MRK $MSFT