The Dow Jones industrial average fell 4 points in Thursday trading to close at 17,733.

The S&P 500 fell 2 points to 2,081.

The Nasdaq fell 2 points to 5,074.

The LABJ Stock Index was flat at 242.

Gainers and Losers

Ritter Pharmaceuticals Inc., a developer of a drug used to treat lactose intolerance, was Thursday’s biggest local gainer among stocks trading above $1. Shares rose 8 percent on the day, closing at $2.38.

Thursday’s biggest loser among stocks trading above $1 was alternative energy developer Rentech Inc. Shares fell 12 percent on the day, closing at $2.60.

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