8:30a U.S. second-quarter productivity up 0.9% from revised 0.1% gain in first quarter 8:30a Unit-labor costs climb 0.6% in the second quarter versus revised 5.4% gain in first quarter 8:30a Hours worked rises 2.5% in the second quarter 8:30a Second quarter output increases 3.4% 8:30a U.S. productivity up 1.2% over past year, compared post-World War II average of 2.1% 8:31a Treasury yields bounce higher after upbeat productivity data 8:33a Gold holds sharp gain after data 8:33a December gold up 1.4% at $1,280.80/oz.