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New York • U.S. stock indexes are wavering between small gains and losses as a late summer lull on Wall Street continues.

Several companies fell sharply in midday trading Thursday after reporting disappointing results.

Dollar General dropped 14 percent after its earnings and revenue fell short of analysts' forecasts.

Signet Jewelers also dropped 14 percent after its results also missed estimates.

At 9:45 a.m. Mountain time, the Dow Jones industrial average fell 5 points, less than 0.1 percent, to 18,474.

The Standard & Poor's 500 index was up a point at 2,176. The Nasdaq composite edged up 6 points, or 0.1 percent, to 5,224.

Bond prices fell. The yield on the 10-year Treasury note rose to 1.57 percent.