Align Technology (ALGN) had the best month in 2006 by a US stock in the S&P 500 (GSPC) in September 2006, returning 81.8%.

ASSET	MONTH	% RETURN
Align Technology (ALGN)	September 2006	81.79%
Centene (CNC)	October 2006	43.84%
Monster Beverage (MNST)	May 2006	41.12%
Intercontinental Exchange (ICE)	January 2006	39.23%
Live Nation Entertainment (LYV)	January 2006	37.6%
ON Semiconductor (ON)	January 2006	35.56%
Hologic (HOLX)	January 2006	35.42%
Monster Beverage (MNST)	March 2006	34.96%
Advanced Micro Devices (AMD)	January 2006	34.75%
Salesforce (CRM)	August 2006	34.74%
Qorvo (QRVO)	January 2006	33.58%
United Airlines (UAL)	October 2006	33.26%
NVIDIA (NVDA)	August 2006	33.08%
Axon Enterprise (AXON)	January 2006	32.58%
Intuitive Surgical (ISRG)	March 2006	31.67%
Seagate Technology (STX)	January 2006	29.75%
Take-Two Interactive Software (TTWO)	September 2006	29.64%
Las Vegas Sands (LVS)	January 2006	29.28%
Steel Dynamics (STLD)	January 2006	29.12%
Schlumberger (SLB)	January 2006	28.93%
Align Technology (ALGN)	January 2006	28.82%
Regeneron Pharmaceuticals (REGN)	October 2006	28.77%
Skyworks Solutions (SWKS)	March 2006	28.65%
Lam Research (LRCX)	January 2006	28.65%
LKQ (LKQ)	January 2006	28.52%