The S&P 500 Index was little changed as banks advanced and utility stocks slumped. West Texas crude sank as much as 4.4 percent before paring the loss in a volatile trading session as investors digested what the Iran move could mean for energy supplies. The greenback strengthened for a third day. Ten-year Treasury yields rose toward 3 percent after JPMorgan Chase & Co. Chief Executive Officer Jamie Dimon warned a climb to

4 percent may be coming.