American International (AIG) had the lowest return between 1999 and 2008 by a US stock in the S&P 500 (GSPC), returning -96.8%.

ASSET	YEARS	% RETURN
American International (AIG)	1999-2008	-96.77%
Builders FirstSource (BLDR)	1999-2008	-90.74%
Ford Motor (F)	1999-2008	-90.52%
Interpublic Group of Companies (IPG)	1999-2008	-89.47%
Micron Technology (MU)	1999-2008	-89.36%
Cadence Design Systems (CDNS)	1999-2008	-87.7%
Akamai Technologies (AKAM)	1999-2008	-86.28%
Las Vegas Sands (LVS)	1999-2008	-85.85%
KKR (KKR)	1999-2008	-85.41%
Advanced Micro Devices (AMD)	1999-2008	-85.1%
Booking (BKNG)	1999-2008	-84.85%
ON Semiconductor (ON)	1999-2008	-84.55%
Teradyne (TER)	1999-2008	-79.96%
Incyte (INCY)	1999-2008	-79.92%
Blackstone (BX)	1999-2008	-79.91%
DexCom (DXCM)	1999-2008	-77.15%
Fifth Third Bancorp (FITB)	1999-2008	-76.97%
Ulta Beauty (ULTA)	1999-2008	-74.91%
Smurfit WestRock (SW)	1999-2008	-73.5%
Motorola Solutions (MSI)	1999-2008	-73.46%
International Paper (IP)	1999-2008	-73.41%
United Airlines (UAL)	1999-2008	-72.91%
CMS Energy (CMS)	1999-2008	-72.41%
United Rentals (URI)	1999-2008	-72.36%
Expedia (EXPE)	1999-2008	-70.04%