QXO (QXO) had the highest return in March 2004 by a large-cap US stock, returning 550%.

ASSET	MONTH	% RETURN
QXO (QXO)	March 2004	550%
First Majestic Silver (AG)	March 2004	59.82%
Axon Enterprise (AXON)	March 2004	41.84%
ArcelorMittal SA ADR (MT)	March 2004	28.82%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	March 2004	27.36%
TIM Participacoes (TIMB)	March 2004	20.89%
NVIDIA (NVDA)	March 2004	19%
Ambev SA ADR (ABEV)	March 2004	18.36%
Cummins (CMI)	March 2004	18.32%
Take-Two Interactive Software (TTWO)	March 2004	16.94%
Monster Beverage (MNST)	March 2004	16.47%
Booking (BKNG)	March 2004	15.71%
NRG Energy (NRG)	March 2004	15.62%
Cooper Companies (COO)	March 2004	14.14%
Powell Industries (POWL)	March 2004	13.92%
WESCO International (WCC)	March 2004	13.74%
Rockwell Automation (ROK)	March 2004	13.3%
Littelfuse (LFUS)	March 2004	13.24%
Comfort Systems USA (FIX)	March 2004	12.99%
Electronic Arts (EA)	March 2004	12.76%
Nomura Holdings Inc ADR (NMR)	March 2004	12.67%
Genesis Healthcare (GEN)	March 2004	12.52%
United Therapeutics (UTHR)	March 2004	12.41%
Apple (AAPL)	March 2004	12.2%
Tyson Foods (TSN)	March 2004	12.11%

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