Vertex Pharmaceuticals (VRTX) had the best month in March 2008 by a large-cap US stock in March 2008, returning 36.7%.

ASSET	MONTH	% RETURN
Vertex Pharmaceuticals (VRTX)	March 2008	36.67%
Sarepta Therapeutics (SRPT)	March 2008	32.37%
AAON (AAON)	March 2008	22.51%
Sociedad Quimica y Minera de Chile SA ADR B (SQM)	March 2008	22.41%
GameStop (GME)	March 2008	22.25%
Rentokil Initial (RTO)	March 2008	19.73%
Ciena (CIEN)	March 2008	19.03%
Mastercard (MA)	March 2008	18.42%
Tenet Healthcare (THC)	March 2008	18.16%
Old Dominion Freight Line (ODFL)	March 2008	16.26%
Coherent (COHR)	March 2008	16.25%
CSX (CSX)	March 2008	15.92%
Intuitive Surgical (ISRG)	March 2008	15.43%
Apple (AAPL)	March 2008	15.32%
RB Global (RBA)	March 2008	15.01%
Chipotle Mexican Grill (CMG)	March 2008	14.58%
JB Hunt Transport Services (JBHT)	March 2008	14.29%
eBay (EBAY)	March 2008	13.76%
DR Horton (DHI)	March 2008	13.64%
Fastenal (FAST)	March 2008	13.35%
Nike (NKE)	March 2008	13.31%
Steel Dynamics (STLD)	March 2008	13.26%
First Solar (FSLR)	March 2008	13.03%
ING Group NV ADR (ING)	March 2008	12.63%
Coca-Cola Consolidated (COKE)	March 2008	12.36%

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