U.S. stocks open slightly higher; Dow, S&P could post fifth straight daily gain

U.S. stocks opened modestly higher on Wednesday, with major indexes trading near record levels and both the Dow and the S&P 500 on track for their fifth straight daily advance. The Dow Jones Industrial Average rose 27 points, or 0.1%, to 24,532. The S&P 500 was up 3 points to 2,667, a gain of 0.1%. Both ended at records on Tuesday. The Nasdaq Composite Index was up 20 points, or 0.3%, at 6,883. Trading was somewhat subdued as investors waited for a Federal Reserve policy decision, with the central bank widely expected to raise interest rates. In company news, Proteostasis Therapeutics Inc. slumped 8% after it said it would sell 7 million shares of its common stock. Nordic American Tankers Ltd. was down 26% a day after it said it would sell $100 million shares via a public offering as part of its recapitalization plan.

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