Investors have poured money into emerging markets in recent years as the search for big stock gains has migrated overseas and as they look for diversification beyond the concentrated S&P 500. But the U.S.-Iran military conflict has reframed the concentration question, highlighting the level of risk in emerging markets when it comes to gains being dependent on a select number of stocks, many tied to the AI boom. The iShares MSCI Emerging Markets ETF (EEM) has had strong performance over the past few years an ...