WASHINGTON (MarketWatch) -- Growth in the U.S. economy from April through June was probably softer than first estimated by the government, private economists said Wednesday after updated trade figures for June were published showing higher imports. Instead of growing at a 2.4% annualized pace in the second quarter, real gross domestic product will likely be revised down to a 1.3% annual rate, according to economists surveyed by MarketWatch. The forecasters are looking for growth of about 2.5% in the final two quarters of the year.