S&P 500 Advances Amid Mixed Earnings as Commodity Shares Rally

  • Energy, raw-material companies surge as the dollar slides
  • Disappointment with IBM results drags tech shares lower

Is the Link Between Stocks and Oil Loosening?

The Standard & Poor’s 500 Index rose Tuesday, extending a four-month high as commodity producers rallied in a seesaw session amid mixed results in corporate earnings.

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