San Francisco-based iShares, the biggest issuer of exchange-traded funds, recently expanded its offerings in the emerging-market niche with the launch of the iSharesCurrency Hedged MSCI Emerging Markets ETF (HEEM). The new fund is the currency-hedged edition of BlackRock’s popular emerging-market focused iShares MSCI Emerging Markets ETF (EEM) and should find favor with investors who wish to protect their earnings from …