Roper Technologies (ROP) had the highest return on October 24, 2011 by a US stock in the S&P 500 (GSPC), returning 13%.

ASSET	DATE	% RETURN
Roper Technologies (ROP)	10/24/2011	12.97%
NXP Semiconductors (NXPI)	10/24/2011	11.25%
CBRE Group Inc Class A (CBRE)	10/24/2011	9.41%
MGM Resorts International (MGM)	10/24/2011	7.91%
Builders FirstSource (BLDR)	10/24/2011	6.9%
DexCom (DXCM)	10/24/2011	6.78%
Advanced Micro Devices (AMD)	10/24/2011	6.75%
Lululemon Athletica (LULU)	10/24/2011	6.73%
First Solar (FSLR)	10/24/2011	6.7%
KKR (KKR)	10/24/2011	6.21%
Charles River Laboratories (CRL)	10/24/2011	6.13%
ON Semiconductor (ON)	10/24/2011	6.02%
Royal Caribbean Cruises (RCL)	10/24/2011	5.95%
Trimble (TRMB)	10/24/2011	5.79%
Juniper Networks (JNPR)	10/24/2011	5.79%
Fortinet (FTNT)	10/24/2011	5.75%
Vertex Pharmaceuticals (VRTX)	10/24/2011	5.74%
Agilent Technologies (A)	10/24/2011	5.48%
Huntington Bancshares (HBAN)	10/24/2011	5.29%
Booking (BKNG)	10/24/2011	5.23%
Las Vegas Sands (LVS)	10/24/2011	5.19%
Trane Technologies (TT)	10/24/2011	5.09%
American International (AIG)	10/24/2011	4.97%
Invesco (IVZ)	10/24/2011	4.85%
F5 Networks (FFIV)	10/24/2011	4.81%