Market Snapshot: Stocks off record highs as drop in miners, chemicals offsets energy rally

U.S. stocks retreat to session lows Friday, putting weekly gains in jeopardy, as weakness in shares of mining and chemical companies, along with a rise in active oil rigs, blunted an advance in the energy sector and rising oil prices.

The slump kept all three main stock-market benchmarks, which hit all-time highs on the same day for the first time since 1999 on Thursday, below their record levels.

The S&P 500 index SPX, -0.15% was down 4 points, or 0.2%, at 2,182, weighed by sharp declines in Alcoa Inc. AA, -2.30% and Nucor Corp.NUE, -3.27% and Dow Chemical Co.

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