Constellation Brands Inc Class A (STZ) had the highest return in June 2012 by a large-cap US stock, returning 42.6%.

ASSET	MONTH	% RETURN
Constellation Brands Inc Class A (STZ)	June 2012	42.57%
CACI International (CACI)	June 2012	30.38%
Cemex SAB de CV ADR (CX)	June 2012	28.44%
Marathon Petroleum (MPC)	June 2012	27.04%
Builders FirstSource (BLDR)	June 2012	25.07%
First Solar (FSLR)	June 2012	24.15%
DexCom (DXCM)	June 2012	24.02%
Lloyds Banking Group PLC ADR (LYG)	June 2012	23.86%
Encompass Health (EHC)	June 2012	23.86%
Contura Energy (CTRA)	June 2012	23.59%
Banco Santander SA ADR (SAN)	June 2012	23.54%
James Hardie Industries PLC ADR (JHX)	June 2012	23.48%
Rambus (RMBS)	June 2012	23.44%
Ciena (CIEN)	June 2012	23.18%
Edwards Lifesciences (EW)	June 2012	22.92%
Banco Bilbao Viscaya Argentaria SA ADR (BBVA)	June 2012	22.74%
Exelixis (EXEL)	June 2012	22.62%
Anheuser Busch Inbev NV ADR (BUD)	June 2012	21.12%
Neurocrine Biosciences (NBIX)	June 2012	20.9%
Korea Electric Power Corp ADR (KEP)	June 2012	20.09%
Woori Financial (WF)	June 2012	19.73%
AeroVironment (AVAV)	June 2012	19.48%
HCA (HCA)	June 2012	19.38%
HDFC Bank Limited ADR (HDB)	June 2012	19.08%
PulteGroup (PHM)	June 2012	19.02%

Large-cap stocks are treated as having a market cap of $10B+.