Youre source? July 31 (Bloomberg) -- The yen and the dollar fell, stock futures rose and metals led commodities higher on speculation a U.S. government report will show the recession in the world's biggest economy eased in the second quarter. The yen declined against all 16 most-traded currencies tracked by Bloomberg as of 9:56 a.m. in London, while the dollar weakened compared with 13 peers. Standard & Poor's 500 Index futures advanced for a second day. Copper rose to the highest level since October, while nickel and zinc climbed to post- September records. The Commerce Department may say the U.S. economy shrank at an annual 1.5 percent rate in the second quarter, compared with a 5.5 percent contraction in the prior three months, according to the median forecast of 78 economists surveyed by Bloomberg News. The U.S. economy has "stepped away from the precipice," President Barack Obama said yesterday. "A good GDP number could boost risk assets again," Werner Eppacher, head of foreign exchange in Frankfurt at DWS Investment GmbH, which oversees about 230 billion euros ($326 billion), said today in a Bloomberg Television interview. "It's a lot more important what market participants assume for the next quarters."