Pilgrims Pride (PPC) had the highest return in March 2009 by a large-cap US stock, returning 104.5%.

ASSET	MONTH	% RETURN
Pilgrims Pride (PPC)	March 2009	104.55%
American International (AIG)	March 2009	92.31%
Bank of America (BAC)	March 2009	89.44%
Orix Corp Ads (IX)	March 2009	74.98%
Teck Resources Ltd Class B (TECK)	March 2009	70.25%
Citigroup (C)	March 2009	68.67%
Barclays PLC ADR (BCS)	March 2009	68.65%
Penske Automotive (PAG)	March 2009	67.2%
Deutsche Bank (DB)	March 2009	60.67%
Ferguson (FERG)	March 2009	60.61%
Blackstone (BX)	March 2009	59.34%
Lululemon Athletica (LULU)	March 2009	54.09%
ASE Industrial Holding Co Ltd ADR (ASX)	March 2009	51.19%
Seagate Technology (STX)	March 2009	46.59%
United Microelectronics (UMC)	March 2009	46.24%
Ciena (CIEN)	March 2009	45.97%
Fifth Third Bancorp (FITB)	March 2009	45.88%
Entegris (ENTG)	March 2009	45.76%
Western Digital (WDC)	March 2009	45.63%
CNH Industrial (CNH)	March 2009	44.76%
CBRE Group Inc Class A (CBRE)	March 2009	43.93%
EXACT Sciences (EXAS)	March 2009	43.68%
Advanced Micro Devices (AMD)	March 2009	43.19%
Flex (FLEX)	March 2009	43.06%
Raymond James Financial (RJF)	March 2009	42.01%

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