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Engine maker Cummins Inc. increased its quarterly cash dividend on common stock to $1.08 per share from $1.025 per share, payable Sept. 1 to shareholders of record on Aug. 18.

The share prices of trucking companies have been on the upswing since mid-May, recouping some of the gains from the bustling start of the year that were lost during a weak spring. While carriers generally are trading higher than a year ago, investors are once again waiting for clarity on the state of the U.S. economy before they send stocks soaring — or plummeting.