Embraer SA ADR (ERJ) had the highest return on September 17, 2001 by a large-cap US stock, returning 49.5%.

ASSET	DATE	% RETURN
Embraer SA ADR (ERJ)	9/17/2001	49.52%
MicroStrategy (MSTR)	9/17/2001	30.57%
CACI International (CACI)	9/17/2001	17.51%
Southwest Airlines (LUV)	9/17/2001	15.56%
FedEx (FDX)	9/17/2001	14.33%
Carnival (CCL)	9/17/2001	14.29%
Ryanair Holdings PLC ADR (RYAAY)	9/17/2001	14.09%
Carnival Plc ADS (CUK)	9/17/2001	13.91%
Hartford Financial Services (HIG)	9/17/2001	12.88%
Travelers Companies (TRV)	9/17/2001	12.12%
Allstate (ALL)	9/17/2001	11.67%
Elbit Systems (ESLT)	9/17/2001	11.51%
Akamai Technologies (AKAM)	9/17/2001	11.46%
Sociedad Quimica y Minera de Chile SA ADR B (SQM)	9/17/2001	11.31%
Teledyne Technologies (TDY)	9/17/2001	11.11%
Willis Towers Watson (WTW)	9/17/2001	10.95%
Biomarin Pharmaceutical (BMRN)	9/17/2001	10.37%
Reinsurance Group of America (RGA)	9/17/2001	10.17%
Brown & Brown (BRO)	9/17/2001	9.66%
Skyworks Solutions (SWKS)	9/17/2001	9.57%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	9/17/2001	9.42%
BlackRock (BLK)	9/17/2001	8.58%
Tapestry (TPR)	9/17/2001	7.87%
Everest (EG)	9/17/2001	7.8%
Petroleo Brasileiro Petrobras SA ADR (PBR)	9/17/2001	7.5%

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