Cognizant Technology Solutions Corp Class A (CTSH) had the lowest return in April 2003 by a US stock in the S&P 500 (GSPC), returning -20.2%.

ASSET	MONTH	% RETURN
Cognizant Technology Solutions Corp Class A (CTSH)	April 2003	-20.18%
Regeneron Pharmaceuticals (REGN)	April 2003	-15.94%
Skyworks Solutions (SWKS)	April 2003	-14.4%
STERIS (STE)	April 2003	-13.23%
Qualcomm (QCOM)	April 2003	-12.66%
Valero Energy (VLO)	April 2003	-12.04%
Nasdaq (NDAQ)	April 2003	-10%
Avery Dennison (AVY)	April 2003	-9.92%
Starbucks (SBUX)	April 2003	-8.91%
Corning (GLW)	April 2003	-8.29%
Cooper Companies (COO)	April 2003	-7.46%
Baker Hughes (BKR)	April 2003	-7.13%
Frank's International (FI)	April 2003	-7.08%
APA (APA)	April 2003	-6.98%
Monster Beverage (MNST)	April 2003	-6.64%
Biogen (BIIB)	April 2003	-6.13%
EOG Resources (EOG)	April 2003	-6%
Mosaic (MOS)	April 2003	-5.92%
Intuitive Surgical (ISRG)	April 2003	-5.81%
ConocoPhillips (COP)	April 2003	-5.76%
Universal Health Services (UHS)	April 2003	-5.03%
Henry Schein (HSIC)	April 2003	-4.98%
Motorola Solutions (MSI)	April 2003	-4.24%
Zimmer Biomet (ZBH)	April 2003	-3.89%
Jacobs Solutions (J)	April 2003	-3.63%