Stocks, bond yields fall on Greece, U.S. data

By Herbert Lash NEW YORK (Reuters) - Global equity markets and bond yields fell on Friday, weighed by data that showed the U.S. economy contracted in the first quarter and by conflicting signals from Greece's debt talks. European shares also fell on data showing private loan growth in the euro zone stalled in April, while the separate report on U.S. gross domestic product also indicated after-tax corporate profits declined 8.7 percent in the first quarter. Conflicting reports that Athens wa