The "Fast Money" traders were assigned to give their final grades to the big companies reporting quarterly results after the market close.

Pete Najarian handed out a 'B+' to Gilead while Dan Nathan awarded it an 'A.'

Steve Grasso gave Twitter a 'C.'

Karen Finerman 'expelled' Yelp on grounds of a disappointing report.

Trader disclosure: On July 28, 2015, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Fast Money" traders: Karen Finerman is long BABA, BAC, C, FINL, FL, GILD, GOOG, GOOGL, JPM, KORS, M, BABA puts, she is short SPY, Her firm is long ANTM, AAPL, BAC, C, DIS, FBT, FINL, FL, GOOG, GOOGL, GPS, IBB, JPM, KORS, M, MYL, PFE, SUNE, URI, XBI, KORS call spreads, SUNE call spreads, KORS puts, her firm is short IWM, SPY, MDY, Karen Finerman is on the board of GrafTech International. Pete Najarian is long AMAT, AAPL, BAC, BMY, BP, CSX, DISCA, DKS, FOXA, GE, KKR, KO, LLY, MRK, PEP, PFE, he is long calls AAPL, AGNC, AMKR, AXP, BAC, C, CRM, CY, DAL, DVN, ETFC, GILD, LC, LM, LULU, LVS, MU, P, PNR, RF, TWTR, UAL, USB, VZ, WYNN, XLF, ZIOP, he is long puts AUY, OAS, RIG. Today he bought GILD, P, and TWTR. Dan Nathan is long QQQ sept put, CMG July weekly put spread, JOY sept calls, TWTR, TWTR sept call spreads, SO, BA sept put spread, COST Aug put spread, TJX aug put , PG july weekly put, SLB aug 28th put spread. Steve Grasso is long AAPL, BA, BAC, DD, DECK, EVGN, FIT, KBH, MJNA, PFE, PHM, T, TWTR, GDX firm is his kids AMZN, IBM own EFG, EFA, EWJ, IJR, SPY.