Three trades to go before the closing bell

The "Halftime Report" traders delivered their trades for the second half.

Tyler Vernon recommended looking at VLO as a refiner play.

Jon Najarian was a buyer of biotech stock ZIOP.

Stephen Weiss was a buyer of the HEDJ.

Trader disclosure: On March 20, 2015, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Halftime Report" traders: Tyler Vernon: Firm long NKE, VLO. Jon Najarian: Long ABT, ADBE, ADP, ADT, AMAT, AN, ATML, ATVI, AUY, BBY, BSX, EQT, EXXI, FNSR, HOG, HUN, INFN, LL, LLTC, MNST, MRVL, MW, NEE, NOK, NRG, NSAM, POST, RHT, RKUS, SIRI, SOL, STLD, SYK, TEVA, TTWO, TWX, WBA, WMB, XLE, YGE, he is long calls AKS, APD, ATML, BABA, BBY, EQT, EWJ, FCAU, FNSR, GRPN, HOG, IDTI, IMAX, KRFT, LLTC, MET, MNST, PRU, RAD, RKUS, SAP, SNDK, TWX, he is long puts YELP, today he bought ZIOP, ZIOP calls. Steve Weiss: Long AAL, AAPL, C, DXGE, EWJ, ESPR, HEDJ, HWAY, MDSO, NBIX, OA, SLXP, THC, VXX, he is short AKS, today he shorted AKS.