The fund will join a crowding field of ETFs, designed to deal with rising rates and inflation, that include offerings from iShares, IndexIQ and PowerShares. WisdomTree's fixed-income ETF lineup includes an emerging-markets-focused local debt fund (NYSEArca:ELD), which has nearly $900 million in assets; and a counterpart focused on Asia (NYSEArca:ALD), which has gathered $476 million. But RRF is global in scope, while the new fund in registration will tap into emerging markets alone, and invest in local-currency-denominated inflation-linked securities issued by government and corporate issuers in Asia, Latin America, Eastern Europe, Africa and the Middle East.