Apple and Microsoft make the S&P 500 top-heavy

Apple and Microsoft have never occupied this much of the S&P 500 Index, leaving some investors worried about the gauge’s increasingly top-heavy nature.Subrat Patnaik for Bloomberg News:The world’s two most-valuable companies saw their combined weightings in the benchmark jump to a record 14% this week after strong earnings reports from Microsoft and others fueled a rally in technology stocks.“It’s concerning to have such concentration in a few names and all those comp