Mosaic (MOS) had the lowest return in June 2003 by a US stock in the S&P 500 (GSPC), returning -23.1%.

ASSET	MONTH	% RETURN
Mosaic (MOS)	June 2003	-23.1%
AES (AES)	June 2003	-20.72%
Western Digital (WDC)	June 2003	-19.53%
Old Dominion Freight Line (ODFL)	June 2003	-19.26%
Garmin (GRMN)	June 2003	-17.85%
CenterPoint Energy (CNP)	June 2003	-16.67%
Cigna (CI)	June 2003	-16.02%
Biogen (BIIB)	June 2003	-15.84%
Texas Instruments (TXN)	June 2003	-15.14%
Intuitive Surgical (ISRG)	June 2003	-14.89%
NVIDIA (NVDA)	June 2003	-14.67%
Trimble (TRMB)	June 2003	-14.29%
Cadence Design Systems (CDNS)	June 2003	-13.55%
Norfolk Southern (NSC)	June 2003	-13.51%
Juniper Networks (JNPR)	June 2003	-13.28%
Universal Health Services (UHS)	June 2003	-12.92%
Teledyne Technologies (TDY)	June 2003	-12.32%
Smith AO (AOS)	June 2003	-11.28%
Molson Coors Brewing (TAP)	June 2003	-11.19%
Booking (BKNG)	June 2003	-11.16%
Advanced Micro Devices (AMD)	June 2003	-10.97%
Analog Devices (ADI)	June 2003	-10.72%
Lennox International (LII)	June 2003	-10.19%
Adobe Systems (ADBE)	June 2003	-10.06%
Skyworks Solutions (SWKS)	June 2003	-9.73%