S&P Indices classifies listed equities into 10 sectors using the Global Industry Classification Standard (GICS®). Each sector reflects particular industries and company trends. Underpinning all S&P Indices, GICS enables investors to compare the performance of one sector against another, as well as to compare sectors across regions.
Alec Young on Global and International Sectors

Among the S&P 500 constituents that reported full 2009 foreign sales, these revenues fell to 46.6% in 2009 from a record 47.9% in 2008, the first decline since 2005 and only the second down year since 2001. The Information Technology and Materials sectors had the highest percentages of foreign sales in 2009 at 56% and 52.1%, respectively.
Sam Stovall on U.S. Sectors

The financial media is flush with prognosticators warning investors about the prospects for a double-dip recession, accompanied by deflation, or what I call a 3-D economy. They point to weakening macro data, particularly as it relates to the U.S. consumer, and tell us that a slowdown in demand would wreak havoc on this fragile economic recovery and throw an already sub-1.0% core CPI below the 0.0% threshold.

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Harnessing Volatility to Manager Risk
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