Nonfarm payroll growth was slower than expected in July and the unemployment rate ticked higher, raising potential trouble signs for the U.S. labor market. Job growth totaled 73,000 for the month, above the June total of 14,000 but below even the meager Dow Jones estimate for a gain of 100,000. June and May totals were revised sharply lower, down by a combined 258,000 from previously announced levels. At the same time, the unemployment rate rose to 4.2%, in line with the forecast. The June total came down from the previously stated 147,000, while the May count fell to just 19,000, revised down by 125,000. Stock market futures fell further after the news while Treasury yields also were sharply lower.