The "Halftime Report" traders went under the radar as the second half of the day began.

Stephanie Link was watching Eagle Materials and Louisiana-Pacific.

Michael Block had his eye on REITs.

Pete Najarian was looking at Delta Air Lines.

Joe Terranova said Virgin America was back.

Trader disclosure: On Aug. 4, 2015, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Halftime Report" were owned by the "Halftime Report" traders: Pete Najarian is long AMAT, AAPL, BAC, BMY, CSX, DISCA, DKS, FOXA, GE, KKR, KO, LLY, MRK, PEP, PFE, he is long calls AAPL, ABX, AGNC, AMKR, AXP, BAC, BMY, CRM, CSX, CY, DAL, DVN, ETFC, FB, LC, LM, LULU, MU, P, PG, PNR, RF, SYY, TWTR, UAL, UPS, USG, WBA, WYNN, VZ, XLF, ZIOP, he is long puts AUY, CTL, RIG. Today he bought WBA calls and CTL puts. Stephanie Link is long AAPL, BAC, CHKP, DAL, ESRX, GILD, HIG, JPM, LLY, LOW, LULU, MA, MCD, MS, PRU, SWK, TIF, WFC. Joe Terranova is long VRTS long VRTS.