Take-Two Interactive Software (TTWO) had the highest return in March 2007 by a US stock in the S&P 500 (GSPC), returning 27.6%.

ASSET	MONTH	% RETURN
Take-Two Interactive Software (TTWO)	March 2007	27.63%
MarketAxess (MKTX)	March 2007	21.83%
Warner Bros Discovery (WBD)	March 2007	21.01%
Steel Dynamics (STLD)	March 2007	18.88%
Freeport-McMoran Copper & Gold (FCX)	March 2007	18.2%
EnergySolutions (ES)	March 2007	15.39%
Gartner (IT)	March 2007	15.31%
Transdigm (TDG)	March 2007	14.94%
EQT (EQT)	March 2007	14.42%
Dollar Tree (DLTR)	March 2007	14.35%
Corning (GLW)	March 2007	13.42%
Molson Coors Brewing (TAP)	March 2007	13.32%
Public Service Enterprise (PEG)	March 2007	13.03%
Valero Energy (VLO)	March 2007	12.74%
First Solar (FSLR)	March 2007	12.7%
Oracle (ORCL)	March 2007	12.54%
Regeneron Pharmaceuticals (REGN)	March 2007	11.67%
Schlumberger (SLB)	March 2007	11.45%
Intuitive Surgical (ISRG)	March 2007	11.45%
Expedia (EXPE)	March 2007	11.44%
Kroger (KR)	March 2007	11.13%
Deckers Outdoor (DECK)	March 2007	10.78%
Monster Beverage (MNST)	March 2007	10.6%
Martin Marietta Materials (MLM)	March 2007	10.6%
Apple (AAPL)	March 2007	10.57%