STIP vs TDTT: Holdings Overlap
STIPiShares 0-5 Year TIPS Bond ETF
iShares · 25 holdings · $15.8B · as of 2026-04-30
TDTTFlexShares iBoxx 3-Year Target Duration TIPS Index Fund
FlexShares · 22 holdings · $2.5B · as of 2026-04-30
How similar are STIP and TDTT?
iShares 0-5 Year TIPS Bond ETF (STIP, by iShares) holds 25 positions; FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT, by FlexShares) holds 22. They have 20 holdings in common, and by portfolio weight the two funds are 65.1% identical. In practical terms the pair is heavily overlapping, with largely the same stocks driving both funds.
- Overlap by Weight
- 65.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 20STIP holds 25 · TDTT holds 22
- Weight in Shared Holdings
- STIP 82%·TDTT 95%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 STIP
5 of 25 positions (14.7% of the fund) are not held by TDTT.
- U.S. Treasury Inflation Linked Notes4.75%
- U.S. Treasury Inflation Linked Notes4.22%
- U.S. Treasury Inflation Linked Notes3.80%
- U.S. Treasury Inflation Linked Bonds1.94%
- U.S. Treasury Inflation Linked Notes0.01%
Only in TDTT
2 of 22 positions (4.3% of the fund) are not held by STIP.
- U.S. Treasury Inflation Linked Notes3.64%
- U.S. Treasury Inflation Linked Bonds0.70%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| STIP | +0.1% | +1.9% | +3.0% | +5.0% | +3.1% | +3.1% | 5.37% |
| 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 STIP vs TDTT →
Shared Holdings(20)
The top 10 shared positions account for 59% of the overlap, led by U.S. Treasury Inflation Linked Notes, U.S. Treasury Inflation Linked Notes and U.S. Treasury Inflation Linked Notes.
| U.S. Treasury Inflation Linked Notes | 5.10% | 10.75% | 5.10% |
|---|---|---|---|
| U.S. Treasury Inflation Linked Notes | 5.08% | 10.68% | 5.08% |
| U.S. Treasury Inflation Linked Notes | 5.50% | 3.74% | 3.74% |
| U.S. Treasury Inflation Linked Notes | 5.47% | 3.72% | 3.72% |
| U.S. Treasury Inflation Linked Notes | 4.59% | 3.56% | 3.56% |
| U.S. Treasury Inflation Linked Notes | 4.68% | 3.50% | 3.50% |
| U.S. Treasury Inflation Linked Notes | 4.32% | 3.49% | 3.49% |
| U.S. Treasury Inflation Linked Notes | 4.19% | 3.44% | 3.44% |
| U.S. Treasury Inflation Linked Notes | 3.76% | 3.40% | 3.40% |
| U.S. Treasury Inflation Linked Notes | 5.30% | 3.37% | 3.37% |
| U.S. Treasury Inflation Linked Notes | 4.24% | 3.37% | 3.37% |
| U.S. Treasury Inflation Linked Notes | 3.25% | 10.71% | 3.25% |
| U.S. Treasury Inflation Linked Notes | 3.76% | 3.25% | 3.25% |
| U.S. Treasury Inflation Linked Notes | 4.79% | 3.12% | 3.12% |
| U.S. Treasury Inflation Linked Notes | 4.90% | 3.08% | 3.08% |
| U.S. Treasury Inflation Linked Notes | 4.78% | 3.00% | 3.00% |
| U.S. Treasury Inflation Linked Bonds | 2.29% | 9.52% | 2.29% |
| U.S. Treasury Inflation Linked Bonds | 1.94% | 2.44% | 1.94% |
| U.S. Treasury Inflation Linked Bonds | 1.73% | 5.13% | 1.73% |
| U.S. Treasury Inflation Linked Bonds | 1.83% | 1.68% | 1.68% |
Frequently Asked Questions
How much do STIP and TDTT overlap?
STIP and TDTT overlap by 65.1% of portfolio weight. They share 20 holdings (STIP holds 25 positions and TDTT holds 22), based on each fund's latest SEC-reported holdings.
Is it redundant to own both STIP and TDTT?
The two portfolios are 65.1% identical by weight. Owning both mostly doubles down on the shared core rather than diversifying: the same large positions drive both funds.
What are the biggest shared holdings of STIP and TDTT?
The largest positions held by both funds are U.S. Treasury Inflation Linked Notes, U.S. Treasury Inflation Linked Notes, U.S. Treasury Inflation Linked Notes, U.S. Treasury Inflation Linked Notes and U.S. Treasury Inflation Linked Notes. Together the top 10 shared positions account for 59% of the total overlap.
What does STIP own that TDTT doesn't?
5 positions (14.7% of STIP) are unique to STIP, led by U.S. Treasury Inflation Linked Notes, U.S. Treasury Inflation Linked Notes and U.S. Treasury Inflation Linked Notes. In the other direction, 2 positions (4.3% of TDTT) are unique to TDTT.