The dollar weakened 0.7 percent to 103.47 yen at 7:37 a.m. in New York. S&P 500 futures slid 0.3 percent after the gauge advanced 0.6 percent last week. Shares in emerging markets rose for a second day. The Stoxx Europe 600 Index added 0.2 percent. Treasuries were little changed following their biggest rally in almost four months on Jan. 10. Nickel jumped 1.5 percent, U.S. natural gas gained 2.9 percent and wheat climbed 0.7 percent.