Top 50 stocks held by Robinhood users 31-40 (# of users holding)  31 Moderna $MRNA 32 Zynga $ZNGA 33 MGM Resorts $MGM 34 Marathon Oil $MRO 35 Southwest Airlines $LUV 36 Starbucks $SBUX 37 Aphria $APHA 38 Coca-Cola $KO 39 Jetblue $JBLU 40 ATandT $T