IEF vs TDTT: Holdings Overlap
IEFiShares 7-10 Year Treasury Bond ETF
iShares · 15 holdings · $47.3B · as of 2026-05-31
TDTTFlexShares iBoxx 3-Year Target Duration TIPS Index Fund
FlexShares · 22 holdings · $2.5B · as of 2026-04-30
Holdings snapshots are 31 days apart (IEF: 2026-05-31, TDTT: 2026-04-30). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IEF and TDTT?
iShares 7-10 Year Treasury Bond ETF (IEF, by iShares) holds 15 positions; FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT, by FlexShares) holds 22. They have 0 holdings in common, and by portfolio weight the two funds are 0.0% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 0IEF holds 15 · TDTT holds 22
- Weight in Shared Holdings
- IEF 0%·TDTT 0%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IEF
15 of 15 positions (98.2% of the fund) are not held by TDTT.
- U.S. Treasury Notes9.54%
- U.S. Treasury Notes8.78%
- U.S. Treasury Notes8.75%
- U.S. Treasury Notes8.73%
- U.S. Treasury Notes8.71%
- U.S. Treasury Notes8.63%
Only in TDTT
22 of 22 positions (99.3% of the fund) are not held by IEF.
- U.S. Treasury Inflation Linked Notes10.75%
- U.S. Treasury Inflation Linked Notes10.71%
- U.S. Treasury Inflation Linked Notes10.68%
- U.S. Treasury Inflation Linked Bonds9.52%
- U.S. Treasury Inflation Linked Bonds5.13%
- U.S. Treasury Inflation Linked Notes3.74%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IEF | -0.2% | -0.9% | +1.3% | +3.1% | -1.6% | +0.5% | 3.95% |
| TDTT | +0.0% | +1.5% | +2.5% | +4.8% | +2.6% | +3.0% | 5.60% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IEF vs TDTT →
Shared Holdings(0)
These two funds have no holdings in common.
Frequently Asked Questions
How much do IEF and TDTT overlap?
IEF and TDTT overlap by 0.0% of portfolio weight. They share 0 holdings (IEF holds 15 positions and TDTT holds 22), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IEF and TDTT?
The two portfolios are 0.0% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What does IEF own that TDTT doesn't?
15 positions (98.2% of IEF) are unique to IEF, led by U.S. Treasury Notes, U.S. Treasury Notes and U.S. Treasury Notes. In the other direction, 22 positions (99.3% of TDTT) are unique to TDTT.