Those who are worried about the knock-on effects of inflation in the coming years may lean towards Treasury Inflation Protected Securities, or TIPS. The PIMCO 15+ Year US TIPS Index ETF (LTPZ) is an index-based ETF that owns inflation-protected Treasury bonds with an effective duration of 22.10 years. That’s roughly three times the 7.5-year effective duration of the well-known iShares TIPS Bond ETF (TIP), which has over $24 billion under management.