The "Halftime Report" traders focused on several of the big names reporting earnings this week.
Pete Najarian told investors to pay attention to Microsoft.
Josh Brown mentioned Yahoo, which reports its quarterly results Tuesday, after the market close.
Trader disclosure: On April 21, 2015, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Halftime Report" traders: Pete Najarian is long AMAT, AAPL, BABA, BAC, BMY, BP, CSX, DISCA, FOXA, GE, KKR, KO, LLY, LOCO, MBLY, MRK, PEP, PFE, he is long calls AMGN, BK, DAL, EEM, F, FL, GE, GS, HZNP, JBLU, KO, MAC, MYL, NEE, NTAP, OC, PBR, PFE, RAD, SYY, TEVA, TSX, UA, UAL, VZ, XLF, XOM, ZIOP, today he bought JBLU calls. Josh Brown is long AAPL, CME, DE, DGRE, DIS, DNKN, FCX, FSLR, GBX, MBLY, SAM, SHAK, SPWR, TNET, TWTR, VWO, XLE, XON. Joe Terranova is long VRTS. Steve Weiss is long AAL, C, CDK, ESPR, HEDJ, MDSO, MU, NBIX, OA.