Standard and Poor's has introduced new "style" and "pure style" indexes to provide investors with a better look at true growth and true value stocks, but the differentiation - which will soon be available through index, exchange-traded and mutual funds - may be lost on the average investor, The Wall Street Journal reports.

Investing veterans believe only skilled financial analysts will be able to appreciate how S&P has divided up its S&P 500 Index with the new measurements. While the new "style" index is a little different from the S&P 500, the "pure style" indexes basically parses out all those stocks in the index that are pure growth and pure value. If, in fact, a stock is neither true growth nor true value, it does not make a "pure style" index.

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