Seagate Technology (STX) had the lowest return in April 2016 by a US stock in the S&P 500 (GSPC), returning -35.8%.

ASSET	MONTH	% RETURN
Seagate Technology (STX)	April 2016	-35.78%
United Airlines (UAL)	April 2016	-20.23%
Super Micro Computer (SMCI)	April 2016	-19.98%
Molina Healthcare (MOH)	April 2016	-19.31%
First Solar (FSLR)	April 2016	-17.74%
Apple (AAPL)	April 2016	-13.83%
Skyworks Solutions (SWKS)	April 2016	-13.4%
Western Digital (WDC)	April 2016	-12.83%
Netflix (NFLX)	April 2016	-12.53%
Delta Air Lines (DAL)	April 2016	-12.27%
NetApp (NTAP)	April 2016	-11.82%
Teradyne (TER)	April 2016	-11.72%
Las Vegas Sands (LVS)	April 2016	-11.24%
Norwegian Cruise Line (NCLH)	April 2016	-10.64%
Hormel Foods (HRL)	April 2016	-10.17%
Viatris (VTRS)	April 2016	-9.76%
Corning (GLW)	April 2016	-9.72%
FirstEnergy (FE)	April 2016	-9.42%
Microsoft (MSFT)	April 2016	-9.41%
Genesis Healthcare (GEN)	April 2016	-8.64%
Jabil Circuit (JBL)	April 2016	-8.63%
Take-Two Interactive Software (TTWO)	April 2016	-8.44%
Chipotle Mexican Grill (CMG)	April 2016	-8.35%
Domino's Pizza Inc Common Stock (DPZ)	April 2016	-8.07%
Zebra Technologies (ZBRA)	April 2016	-8.01%