TDTT vs VTP

TDTTBNorthern Trust iBoxx 3-Year Target Duration TIPS ETF

VTPAVanguard Total Inflation-Protected Securities ETF

In short

TDTT TIPS duration wanders as inflation expectations shift. TDTT's index pins it, targeting a modified adjusted duration of 3.0 years and rebalancing monthly: inflation-linked Treasuries on a short leash.

VTP Vanguard's ETF answer for the whole TIPS curve. It tracks a market-value-weighted index of Treasury inflation-linked bonds with at least a year left to run, charges five basis points, and opened for business in 2025.

Stated mandate

TDTT The Fund seeks to track, before fees and expenses, the price and yield performance of the iBoxx 3-Year Target Duration TIPS Index. It uses a passive indexing approach, generally replicating the index or using representative sampling when full replication is impracticable.

VTP The Fund passively tracks the full market of U.S. Treasury inflation-protected public obligations through the ICE U.S. Treasury Inflation Linked Bond Index.

Why people hold it

• TDTT The index targets a modified adjusted duration of 3.0 years, resets when it strays past a 5% band, and rebalances monthly. Duration is the design, not a byproduct.flexshares.comflexshares.com 2
• Built from TIPS with one to ten years to maturity and at least $2 billion outstanding, so the sleeve leans on the biggest, most tradable issues.flexshares.comflexshares.com 2
• Listed in 2011 and now a multibillion-dollar fund from Northern Trust, long past the stage where a niche bond ETF is fighting for scale.

• VTP Five basis points: under half the typical fund in its Treasury peer group, and well below the 0.12% charged by broad TIPS rival SPIP.
• Full-curve coverage. The index is market value weighted and takes inflation-protected Treasuries with at least one year to maturity, no upper limit, so no single maturity slice bet.ice.com
• Vanguard's other inflation-linked ETF stops below five years to maturity. This one is the long-end-included sibling, in the same low-cost index wrapper.vanguard.com
• The inflation link sits inside the bonds, not in a strategy overlay: principal and coupons are indexed to consumer prices, and the fund passes income through quarterly.vanguard.com

Worth knowing

• TDTT 0.18% net of a waiver through March 1, 2027 (0.19% gross), above the category median. Plain market-cap TIPS funds like SCHP and VTIP charge 0.03%.
• Pinning duration near three years is a middle setting: it moves less with rates than long TIPS, more than cash-like short TIPS.flexshares.com
• TIPS coupons move with CPI adjustments, so payouts land on an irregular schedule and vary in size rather than arriving as a steady check.flexshares.com

• VTP Owning the long end cuts both ways. Real-rate moves hit a full-maturity TIPS portfolio harder than a sub-five-year one, so expect more price movement.ice.comvanguard.com
• A 2025 launch means a short track record and thinner trading than the long-established TIPS funds, which can show up as wider bid-ask spreads.
• Payouts move with inflation adjustments rather than a fixed rate, and Vanguard discloses that a distribution can include return of capital.vanguard.com

Full TDTT profile⁠

Full VTP profile⁠