Just a month and half into 2012, emerging local currency bonds have already returned 9 percent, one of best performing asset classes. But the rally has further to go, says J.P. Morgan which runs the most widely used emerging debt indices. The bank is now predicting its benchmark local currency debt index, the GBI-EM, to end the year with returns of 16 percent, upping its original expectation for 11.9 percent.