GOOGLE对要害词密度并没有像YAHOO和MSN那么重视，但是也算影响排名的因素之一。

GOOGLE did not resemble YAHOO and MSN taking seriously so to keyword density, but one of elements that also calculate influence rank.

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据戴维斯研究机构，按股息算，标普500指数中排名前25%的股票市盈率达17倍，而过去36年市场平均市盈率为12倍。

The forward price/earnings ratio of the top 25% of S&P 500 stocks by dividend yield is 17, vs. a 36-year average of 12, according to Ned Davis Research.

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