Fidelity Series Treasury Bill Index Fund
U.S. bond index fund · tracks Bloomberg U.S. 3-6 Month Treasury Bill Index
Fidelity Series Treasury Bill Index Fund seeks a high level of current income consistent with preservation of capital.
The fund tracks the Bloomberg U.S. 3-6 Month Treasury Bill Index using statistical sampling techniques, holding a smaller number of securities selected to replicate the index's returns based on duration, maturity, interest rate sensitivity, and credit quality. Because the fund samples rather than holds all index constituents, its returns may diverge from the index.
What you own
| Company | Weight | Value | Shares |
|---|---|---|---|
UST BILLS 0.00% · due 2026-09-03 | 8.99% | $175.94M | — |
UST BILLS 0.00% · due 2026-07-09 | 8.68% | $169.72M | — |
UST BILLS 0.00% · due 2026-08-06 | 8.58% | $167.90M | — |
UST BILLS 0.00% · due 2026-07-02 | 5.51% | $107.83M | — |
UST BILLS 0.00% · due 2026-09-17 | 5.48% | $107.25M | — |
UST BILLS 0.00% · due 2026-09-24 | 5.48% | $107.17M | — |
UST BILLS 0.00% · due 2026-09-10 | 5.34% | $104.51M | — |
UST BILLS 0.00% · due 2026-07-16 | 5.30% | $103.73M | — |
UST BILLS 0.00% · due 2026-08-13 | 5.28% | $103.26M | — |
UST BILLS 0.00% · due 2026-07-30 | 5.28% | $103.19M | — |
All 23 holdings, with the share counts as filed, open with a free account.
What the fund is made of
Percentages are of fund net assets. Rounding, liabilities and short positions can make totals differ from 100%.
| Bonds | 99.63% |
| Cash & short-term | 0.67% |
How it has done
FHQFX share class · total returns with dividends reinvested
Volatility over the last 12 months: 0.23%. Past returns are a record, not a forecast.
May 2026 and Jun 2026 and Jul 2026 have been filed since the trailing figures were struck, so they are not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Fees & fund details
Fidelity Series Treasury Bill Index Fund is a U.S. bond index fund that tracks the Bloomberg U.S. 3-6 Month Treasury Bill Index.
- Asset class
- Bonds
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
- Credit quality
- Investment grade
- Rate sensitivity
- Short duration
- Expense ratio, by class
- 0.00%· FHQFX 0.00%
- Portfolio turnover
- 0.00% a year · as of 2026 Q2
Turnover is how much of the portfolio was replaced in a year.
Classified from what the fund holds, not from its name · 2026 Q2. The summary is a paraphrase of the prospectus; the objective is verbatim.
What changed this quarter
Positions that entered or left the fund since its previous filing. Positions that were only resized are not listed.
17 new· the largest 1
22 exited· the largest 1
Debt profile
What this fund holds — value-weighted across its bond and securitized long positions · as of 2026-04-30
Share of the fund's debt by how its coupon behaves — the fact that decides whether a rate move reaches this portfolio at all.
| Fixed rate | 100.0% |
Share of the fund's debt value in each maturity band, shortest first.
| <1y | 100.0% |
Based on what filers reported; a filer that never reported a flag also reads as none.
Risk profile
Interest-rate and credit-spread sensitivity, both in years · as of 2026Q2
More of this fund’s sensitivity sits in credit spreads than in interest rates — a rate rally that comes with a credit selloff works against it.
Where the loss would come from. The two shocks are the same size, so this is the balance of the fund's two sensitivities rather than a bet on one moving more.
| Credit spreads | 56% |
| Interest rates | 44% |
Filers report the impact of a 0.01% move only, so the total is our own scaling of that one number and overstates the loss on most bonds — read it as approximate, never as precise. The two sensitivities overlap rather than add up: they measure the same positions against different shocks, which is why the durations above are shown side by side and never summed.
Share of the fund's spread duration carried by each credit tier.
| Investment grade | +0.33 yr |
Share of duration at each point, shortest first. This filer signs its rate and credit disclosures differently; the direction shown follows its interest-rate filing, and a negative reading is the least-supported figure here.
| 3 mo | 0.25 yr | 94% |
| 1 yr | 0.01 yr | 6% |
5 yr is NEGATIVE (-0.00 yr) — a deliberate hedge at that point on the curve, so it is not part of the band above.
| 3 mo | 0.25 yr | 74% |
| 1 yr | 0.02 yr | 6% |
| 5 yr | 0.07 yr | 20% |
The two bands measure the same positions against different shocks and do not add — a Treasury carries rate duration and no spread duration, a floating-rate credit the reverse. Rate tenors are also summed across every currency the fund discloses.
Show the numbers
| Tenor | Rate yrs | IG yrs | HY yrs | IG $/bp | HY $/bp |
|---|---|---|---|---|---|
| 3 mo | +0.25 | +0.25 | +0.00 | $48.6k | $0 |
| 1 yr | +0.01 | +0.02 | +0.00 | $3.6k | $0 |
| 5 yr | -0.00 | +0.07 | +0.00 | $13.1k | $0 |
| 10 yr | +0.00 | +0.00 | +0.00 | $0 | $0 |
| 30 yr | +0.00 | +0.00 | +0.00 | $0 | $0 |
Dollar change per 1bp of spread movement, as filed and sign-anchored. A blank cell was not filed; a zero was.
A newer credit-spread reading (2026Q3) is on file. This page holds one quarter across every figure on it, so that one appears here next quarter.
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