T-Mobile US (TMUS) had the highest return on October 11, 2012 by a US stock in the S&P 500 (GSPC), returning 5.8%.

ASSET	DATE	% RETURN
T-Mobile US (TMUS)	10/11/2012	5.82%
Take-Two Interactive Software (TTWO)	10/11/2012	5.58%
Enphase Energy (ENPH)	10/11/2012	3.75%
Deckers Outdoor (DECK)	10/11/2012	2.78%
Fastenal (FAST)	10/11/2012	2.68%
Cigna (CI)	10/11/2012	2.22%
WW Grainger (GWW)	10/11/2012	2.14%
CBRE Group Inc Class A (CBRE)	10/11/2012	2.09%
NRG Energy (NRG)	10/11/2012	2.07%
LKQ (LKQ)	10/11/2012	1.86%
Huntington Ingalls Industries (HII)	10/11/2012	1.81%
Steel Dynamics (STLD)	10/11/2012	1.64%
Lam Research (LRCX)	10/11/2012	1.58%
Super Micro Computer (SMCI)	10/11/2012	1.54%
Elevance Health (ELV)	10/11/2012	1.39%
Monolithic Power Systems (MPWR)	10/11/2012	1.27%
Freeport-McMoran Copper & Gold (FCX)	10/11/2012	1.17%
Marriott International (MAR)	10/11/2012	1.17%
Mastercard (MA)	10/11/2012	1.15%
Chipotle Mexican Grill (CMG)	10/11/2012	1.13%
EQT (EQT)	10/11/2012	1.06%
General Motors (GM)	10/11/2012	1.02%
Electronic Arts (EA)	10/11/2012	1.01%
Assurant (AIZ)	10/11/2012	0.96%
Walgreens Boots Alliance (WBA)	10/11/2012	0.92%