Shares rise on rebound in oil prices; dollar slips

Stock markets worldwide rose modestly on Tuesday after a landmark nuclear deal between Tehran and six global powers left sanctions on Iran in place for now, spurring gains in energy shares, while expectations for weak corporate results capped U.S. share gains. The deal, which is set to ease sanctions against Tehran and allow a gradual rise in its oil exports, had initially sent oil prices tumbling. Benchmark Brent crude futures settled up 66 cents, at $58.51 a barrel.