Emerging-market stocks are back on top in April after punishing Iran selloff. Why they can keep on climbing.

A popular exchange-traded fund that tracks stocks in emerging markets has surged in April — but the ETF is still trailing the S&P 500 since the start of the Iran conflict.

​A popular exchange-traded fund that tracks stocks in emerging markets has surged in April — but the ETF is still trailing the S&P 500 since the start of the Iran conflict.