U.S. oil prices continued their longest losing streak in 4 1/2 years on Tuesday as investors doubted the strength of the U.S. economy. Light, sweet crude for August delivery fell 13 cents, or 0.1%, to $103.40 a barrel on the New York Mercantile Exchange, the lowest closing price since June 6. The benchmark for U.S. oil prices marked its seventh straight session of losses, the longest such streak since Dec. 14, 2009. While U.S. employers added jobs at a robust clip in June, gross domestic product growth has remained sluggish. “Prices are affected by the ebbs and flows of overall U.S. economic health,” said Carl Larry, an analyst at Oil Outlooks & Opinions. “We’re doing a great job-wise but not so much GDP-wise.” In a survey by The Wall Street Journal, analysts expect that crude-oil stockpiles fell 2 million barrels in the week ended July 4. […]