RRF, which will join a crowding field of ETFs designed to deal with rising rates and inflation, will have a particular focus on commodities-rich economies in developed as well as emerging market countries. WisdomTree's fixed-income ETF lineup includes an emerging markets-focused local debt fund (NYSEArca:ELD), which has nearly $900 million in assets; and its Asian counterpart (NYSEArca:ALD), which has gathered $476 million in AUM. The WisdomTree Global Real Return Fund (NYSEArca:RRF) is designed to give investors capital appreciation and income that exceed the long-term rate of inflation, according to paperwork the company filed with U.S. regulators this week.