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Sector Funds: More Than Meets The Eye
http://art.fdlive.com/articles/42926/1/Sector-Funds--More-Than-Meets-The-Eye/Page1.html
Bill Byrnes
Bill Byrnes is co-founder of MUTUALdecision, a website providing mutual fund data, and the author of the MUTUALdecision Blog. He's been an investment banker with Alex. Brown & Sons and a Finance Professor at Georgetown University. He's been CEO, chairman and served on the board of directors of several public and private companies. He holds MBA and JD degrees and is a Chartered Financial Analyst with over 30 years experience in the investment industry. 
By Bill Byrnes
Published on 04/25/2008
 
Sector funds have their place in your portfolio, not as core holdings, but as a diversified way of making targeted investments in selected niches.