Shares of American Water Works Co. shot up to a record high in active trade Wednesday, after S&P Dow Jones Indices said it was adding the water services company to the S&P 500 Index . The stock climbed 4.1% in midday trade. Volume just before noon Eastern was 7 million shares, or more than five times the full-day average over the past 30 days, according to FactSet. The intraday high of $68.87 was the highest seen since the company went public in April 2008. The stock will replace Consol Energy Inc. in S&P’s benchmark index of large-capitalization companies, effective after the close of trading on Thursday. Consol is being pushed down to the S&P MidCap 400 , replacing Solera Holdings Inc. .
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