RINF provides investors with a way to gain from increases in the market`s expectation of inflation. All else equal, Treasury yields will rise relative to TIPS (Treasury inflation-protected securities) yields when market participants expect more inflation. Since yields and returns move inversely, RINF goes long TIPS and short Treasurys of similar maturity to capture this spread. One key facet of this approach is that it only gains when the spread changes when the market changes its mind. It provides no gains whatsoever if the market`s expectation of inflation stays the same, and it will lose if spreads tighten. Still, such an approach would presumably hold some appeal in an era of extremely loose monetary policy. Prior to Apr. 18, 2016 RINF tracked the Credit Suisse 30-Year Inflation Breakeven Index under the name ProShares 30 Year TIPS/TSY Spread. The index change is not expected to have a material impact on the investment objective.