The launch comes just a month after State Street Global Advisors filed paperwork with U.S. regulators to market a similar ETF that would tap into breakeven inflation through a long TIPS/short bond portfolio. ProShares, the largest purveyor of leveraged and inverse ETFs, today rolled out a pair of funds that allow investors to express an outlook on inflation by pairing exposure of 30-year Treasury bonds with TIPs, a first for the U.S. ETF market. One ETF is long 30-year T-bonds and short 30-year TIPs, and the other achieves the opposite.