TIP tracks a market-value-weighted index of U.S. Treasury inflation-protected securities with at least one year remaining in maturity. In tandem with that trend is the popularity of one ETF that is designed to combat the impact of rising inflation on a fixed-income portfolio: the iShares TIPS Bond ETF (TIP). TIP was the first, and today it’s the largest, ETF in our U.S. Government TIPS ETF segment, with $18 billion in assets.