United Airlines (UAL) had the lowest return in April 2008 by a US stock in the S&P 500 (GSPC), returning -32.6%.

ASSET	MONTH	% RETURN
United Airlines (UAL)	April 2008	-32.58%
Garmin (GRMN)	April 2008	-25.77%
Axon Enterprise (AXON)	April 2008	-24.26%
Huntington Bancshares (HBAN)	April 2008	-16.46%
Chipotle Mexican Grill (CMG)	April 2008	-13.91%
Caesars Entertainment (CZR)	April 2008	-13.66%
MGM Resorts International (MGM)	April 2008	-13.33%
MarketAxess (MKTX)	April 2008	-13.23%
PulteGroup (PHM)	April 2008	-12.89%
GE Aerospace (GE)	April 2008	-12.47%
Intuitive Surgical (ISRG)	April 2008	-12.08%
Super Micro Computer (SMCI)	April 2008	-11.61%
Seagate Technology (STX)	April 2008	-10.47%
State Street (STT)	April 2008	-9.98%
Packaging Corp of America (PKG)	April 2008	-9.96%
Netflix (NFLX)	April 2008	-9.91%
Rollins (ROL)	April 2008	-9.9%
Builders FirstSource (BLDR)	April 2008	-9.85%
Masco (MAS)	April 2008	-9.31%
Colgate-Palmolive (CL)	April 2008	-9.24%
Ameriprise Financial (AMP)	April 2008	-9.13%
Starbucks (SBUX)	April 2008	-8.97%
Tractor Supply (TSCO)	April 2008	-8.93%
Lennox International (LII)	April 2008	-8.71%
Walgreens Boots Alliance (WBA)	April 2008	-8.7%