Fund · FlexShares iBoxx 5-Year Target Duration TIPS Index Fund · measured from SEC filings
TDTF holdings
TDTF reports 17 holdings and behaves like 13.5 equally weighted ones, computed from its SEC Form N-PORT filing for 2026-07-31. The fact sheet publishes the first number; this page computes the second, and traces it across 27 quarters of filings.
Measured concentration
as of 2026-07-31Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 0% at a quoted market price (level 1), one issuer country.
What stands out
as of 2026-07-31TDTF's largest investment is U.S. Treasury Inflation Linked Notes at 10.51% of net assets. U.S. Treasury Inflation Linked Notes and U.S. Treasury Inflation Linked Notes follow; the three together are 30.75%. Ten companies are 71.87% of the fund; the other 7 share the rest. Among the 192 bond funds measured here, TDTF behaves like 13.5 holdings against a median of 236.4 — 16.7 times more concentrated than the median. Across 27 quarterly filings TDTF has become more concentrated: it behaved like 20.4 at 2019-10-31 and 14.8 at 2026-04-30. Between the 2026-01-31 and 2026-04-30 filings 0 positions were added and 2 dropped; 5.8% of the weight moved.
Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable bond funds on this site. Nothing here is a view on the fund.
Every filing since 2019
27Between 2019-10-31 and 2026-04-30, TDTF went from behaving like 20.4 equally weighted positions to 14.8 — 28% fewer, while its top ten went from 56.25% to 69.25% of net assets. Read across the funds on the concentration-over-time table.
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2026-04-30 | 18 | 14.8 | 69.25% | 10.55% |
| 2026-01-31 | 20 | 16.9 | 63.94% | 9.25% |
| 2025-10-31 | 20 | 17.1 | 63.54% | 9.03% |
| 2025-07-31 | 21 | 17.8 | 62.59% | 8.27% |
| 2025-04-30 | 23 | 19.8 | 57.53% | 7.82% |
| 2025-01-31 | 24 | 21.1 | 54.51% | 7.08% |
| 2024-10-31 | 24 | 21.4 | 54.1% | 6.93% |
| 2024-07-31 | 24 | 21.1 | 54.55% | 7.1% |
Earlier filings (19 more, back to 2019-10-31)
| Period | Holdings | Effective | Top 10 | Largest |
|---|---|---|---|---|
| 2024-04-30 | 24 | 21 | 55.17% | 6.94% |
| 2024-01-31 | 25 | 22.2 | 52.78% | 6.48% |
| 2023-10-31 | 25 | 22.9 | 50.38% | 6% |
| 2023-07-31 | 25 | 22.4 | 51.75% | 6.45% |
| 2023-04-30 | 25 | 22.4 | 51.77% | 6.42% |
| 2023-01-31 | 25 | 22.1 | 52.33% | 6.73% |
| 2022-10-31 | 26 | 23.5 | 49.72% | 6% |
| 2022-07-31 | 25 | 22.2 | 51.98% | 7.29% |
| 2022-04-30 | 25 | 22.3 | 51.56% | 7.4% |
| 2022-01-31 | 25 | 22.7 | 50.42% | 7.21% |
| 2021-10-31 | 26 | 22.6 | 50.63% | 6.93% |
| 2021-07-31 | 26 | 24.1 | 47.45% | 6.21% |
| 2021-04-30 | 26 | 23.9 | 48.61% | 5.93% |
| 2021-01-31 | 26 | 24 | 47.87% | 5.57% |
| 2020-10-31 | 26 | 24.1 | 47.26% | 5.06% |
| 2020-07-31 | 27 | 24 | 49.77% | 5.48% |
| 2020-04-30 | 24 | 20.9 | 55.76% | 8.48% |
| 2020-01-31 | 24 | 21.9 | 52.39% | 6.3% |
| 2019-10-31 | 23 | 20.4 | 56.25% | 7.79% |
One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.
Largest positions, as filed
as of 2026-04-30The 15 largest of 17 positions in TDTF's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: TDTF.csv.gz.
| # | Position | Weight | Cumulative |
|---|---|---|---|
| 1 | United States of America | 10.55% | 10.6% |
| 2 | United States of America | 10.28% | 20.8% |
| 3 | United States of America | 10.05% | 30.9% |
| 4 | United States of America | 9.89% | 40.8% |
| 5 | United States of America | 5.20% | 46.0% |
| 6 | United States of America | 4.88% | 50.8% |
| 7 | United States of America | 4.68% | 55.5% |
| 8 | United States of America | 4.62% | 60.2% |
| 9 | United States of America | 4.62% | 64.8% |
| 10 | United States of America | 4.49% | 69.3% |
| 11 | United States of America | 4.34% | 73.6% |
| 12 | United States of America | 4.27% | 77.9% |
| 13 | United States of America | 4.23% | 82.1% |
| 14 | United States of America | 4.22% | 86.3% |
| 15 | United States of America | 4.19% | 90.5% |
Returns the fund reported
2019-08 – 2026-04Monthly total returns from Item B.5 of TDTF's own filings, 81 months on record. Not computed here and not from a price feed.
Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: TDTF.json · all funds.
Who borrows TDTF's shares
2026-07-31The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-07-31, $179m was out to 2 borrowers. The largest, Merrill Lynch International, held 79.7% of it.
| Borrower | On loan | Share of the loan |
|---|---|---|
| Merrill Lynch International | $143m | 79.7% |
| NOMURA SECURITIES INTERNATIONAL INC. | $36m | 20.3% |
The filing reports no cash collateral position against this loan. Collateral taken in a form the fund does not hold as a position does not appear in N-PORT, so this is silence rather than absence. What the collateral figure can and cannot show. Every quarter TDTF has filed, with each borrower: TDTF.json · all funds.
Since the previous filing
2026-01-31 → 2026-04-3020 positions became 18: 0 added (0.0% of the fund at the later date), 2 dropped (5.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 5.8%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of TDTF compared this way, as a feed: changes.xml · all funds: filings received.
| Largest increases | 2026-01-31 | 2026-04-30 | Largest decreases | 2026-01-31 | 2026-04-30 |
|---|---|---|---|---|---|
| United States of America | 9.25% | 10.55% | |||
| United States of America | 9.01% | 10.28% | |||
| United States of America | 8.66% | 9.89% | |||
| United States of America | 8.84% | 10.05% | |||
| United States of America | 1.74% | 1.98% | |||
| United States of America | 4.62% | 4.68% |
Gone: United States of America (3.93%), United States of America (1.88%).
Asset categories and pricing
as of 2026-07-31100.00% debt as filed; 0.0% carried at a quoted market price (fair-value level 1). Categories and levels are the filer's; what a low level-1 share does and does not mean is in the measure's page.
Neighbours by effective holdings, debt funds
10Every measured debt fund lined up by how many holdings it behaves like; these sit either side of TDTF (13.5). Same filings, same arithmetic. Position in this list says nothing about which fund is better.
| Fund | Reports | Behaves like | Top ten | As of |
|---|---|---|---|---|
| BCI abrdn Bloomberg All Commodity Strategy K-1 Free ETF | 32 | 10.1 * | 70.2% | 2026-06-30 |
| DFIP Dimensional Inflation-Protected Securities Portfolio ETF | 21 | 12.4 | 81.87% | 2026-07-31 |
| IEF iShares 7-10 Year Treasury Bond ETF | 16 | 12.5 | 85.53% | 2026-05-31 |
| CSHI NEOS Enhanced Income 1-3 Month T-Bill ETF | 19 | 13.2 | 78.04% | 2026-06-30 |
| SDCI USCF SummerHaven Dynamic Commodity Strategy No K-1 Fund | 31 | 13.5 * | 73.97% | 2026-06-30 |
| LTPZ PIMCO 15+ Year U.S. TIPS Index Exchange-Traded Fund | 16 | 13.6 | 78.33% | 2026-06-30 |
| TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 23 | 14.9 | 65.87% | 2026-07-31 |
| ZROZ PIMCO 25+ Year Zero Coupon U.S. Treasury Index Exchange-Traded Fund | 20 | 19.8 | 53.29% | 2026-06-30 |
| IBHF iShares iBonds 2026 Term High Yield and Income ETF | 117 | 20.2 | 42.17% | 2026-07-31 |
| IBDR iShares iBonds Dec 2026 Term Corporate ETF | 230 | 21.2 | 31.6% | 2026-07-31 |
Essays that examine TDTF
0Mentions are detected across the full text of every article, so an appearance may be a passing comparison rather than the subject. Nothing here is a recommendation to buy or sell — see the disclaimer.