4-Week Treasury Bill Auction Results
Results of every 4-week Treasury bill auction from Oct 16, 2025 to Oct 15, 2026 (53 auctions), from the U.S. Treasury Fiscal Data API. The latest 4-week Treasury bill auction, on Oct 15, 2026, produced a high investment rate of 4.068% (+2.0 bp vs the prior auction on Oct 8, 2026), with a bid-to-cover ratio of 2.56.
U.S. Treasury securities: not FDIC-insured · not bank deposits · market value can change before maturity
- Latest high investment rate4.068%
- Low in this period3.609%
- High in this period4.099%
- Auctions on file53 since
Upcoming 4-week Treasury bill auctions
| Auction date | Security | Term | CUSIP | Offering amount | Issue date | Status | Source |
|---|---|---|---|---|---|---|---|
| Bill (reopening) | 4-Week | 912797VY0 | not yet announced | Tentative | Fiscal Data API |
Source: U.S. Treasury, Bureau of the Fiscal Service — Upcoming Auctions and Treasury Securities Auctions Data (Fiscal Data API), retrieved 2026-10-16 23:44 CDT. “Tentative” = on the Treasury schedule, offering announcement pending, so no amount yet; dates and amounts are set by Treasury and can change.
4-Week Treasury Bill auction history
| Auction date | Security | Term | CUSIP | Headline rate | Bid-to-cover | Change vs prior same-term | Source |
|---|---|---|---|---|---|---|---|
| Bill (reopening) | 4-Week | 912797VX2 | 4.068% inv. rate | 2.56 | +2.0 bp vs Oct 8 | results PDF | |
| Bill (reopening) | 4-Week | 912797VW4 | 4.048% inv. rate | 2.40 | +9.2 bp vs Oct 1 | results PDF | |
| Bill (reopening) | 4-Week | 912797VP9 | 3.956% inv. rate | 2.83 | +4.1 bp vs Sep 24 | results PDF | |
| Bill (reopening) | 4-Week | 912797VN4 | 3.915% inv. rate | 2.61 | +3.0 bp vs Sep 17 | results PDF | |
| Bill (reopening) | 4-Week | 912797VM6 | 3.885% inv. rate | 3.02 | +4.6 bp vs Sep 10 | results PDF | |
| Bill (reopening) | 4-Week | 912797VL8 | 3.839% inv. rate | 2.81 | +7.7 bp vs Sep 3 | results PDF | |
| Bill (reopening) | 4-Week | 912797VK0 | 3.762% inv. rate | 2.97 | +5.1 bp vs Aug 27 | results PDF | |
| Bill (reopening) | 4-Week | 912797VE4 | 3.711% inv. rate | 2.73 | +1.0 bp vs Aug 20 | results PDF | |
| Bill (reopening) | 4-Week | 912797VD6 | 3.701% inv. rate | 2.84 | +1.5 bp vs Aug 13 | results PDF | |
| Bill (reopening) | 4-Week | 912797VC8 | 3.686% inv. rate | 2.77 | −1.5 bp vs Aug 6 | results PDF | |
| Bill (reopening) | 4-Week | 912797VB0 | 3.701% inv. rate | 2.68 | +1.0 bp vs Jul 30 | results PDF | |
| Bill (reopening) | 4-Week | 912797UW5 | 3.691% inv. rate | 2.80 | −10.2 bp vs Jul 23 | results PDF | |
| Bill (reopening) | 4-Week | 912797UV7 | 3.793% inv. rate | 2.79 | +7.2 bp vs Jul 16 | results PDF | |
| Bill (reopening) | 4-Week | 912797UU9 | 3.721% inv. rate | 2.57 | +3.0 bp vs Jul 9 | results PDF | |
| Bill (reopening) | 4-Week | 912797UT2 | 3.691% inv. rate | 2.64 | +2.6 bp vs Jul 2 | results PDF | |
| Bill (reopening) | 4-Week | 912797US4 | 3.665% inv. rate | 2.72 | −0.5 bp vs Jun 25 | results PDF | |
| Bill (reopening) | 4-Week | 912797UR6 | 3.670% inv. rate | 2.74 | +3.0 bp vs Jun 18 | results PDF | |
| Bill (reopening) | 4-Week | 912797UQ8 | 3.640% inv. rate | 2.99 | −1.5 bp vs Jun 11 | results PDF | |
| Bill (reopening) | 4-Week | 912797UP0 | 3.655% inv. rate | 3.13 | −2.1 bp vs Jun 4 | results PDF | |
| Bill (reopening) | 4-Week | 912797UN5 | 3.676% inv. rate | 3.07 | −1.5 bp vs May 28 | results PDF | |
| Bill (reopening) | 4-Week | 912797UC9 | 3.691% inv. rate | 2.76 | +2.1 bp vs May 21 | results PDF | |
| Bill (reopening) | 4-Week | 912797UB1 | 3.670% inv. rate | 2.60 | +0.5 bp vs May 14 | results PDF | |
| Bill (reopening) | 4-Week | 912797UA3 | 3.665% inv. rate | 2.66 | −0.5 bp vs May 7 | results PDF | |
| Bill (reopening) | 4-Week | 912797TZ0 | 3.670% inv. rate | 2.59 | +1.0 bp vs Apr 30 | results PDF | |
| Bill (reopening) | 4-Week | 912797TU1 | 3.660% inv. rate | 2.92 | +0.5 bp vs Apr 23 | results PDF | |
| Bill (reopening) | 4-Week | 912797TT4 | 3.655% inv. rate | 2.98 | 0.0 bp vs Apr 16 | results PDF | |
| Bill (reopening) | 4-Week | 912797TS6 | 3.655% inv. rate | 3.12 | +3.6 bp vs Apr 9 | results PDF | |
| Bill (reopening) | 4-Week | 912797TR8 | 3.619% inv. rate | 3.28 | −6.2 bp vs Apr 2 | results PDF | |
| Bill (reopening) | 4-Week | 912797TL1 | 3.681% inv. rate | 3.15 | 0.0 bp vs Mar 26 | results PDF | |
| Bill (reopening) | 4-Week | 912797TK3 | 3.681% inv. rate | 3.03 | +0.5 bp vs Mar 19 | results PDF | |
| Bill (reopening) | 4-Week | 912797TJ6 | 3.676% inv. rate | 3.12 | −2.5 bp vs Mar 12 | results PDF | |
| Bill (reopening) | 4-Week | 912797TH0 | 3.701% inv. rate | 2.77 | 0.0 bp vs Mar 5 | results PDF | |
| Bill (reopening) | 4-Week | 912797TG2 | 3.701% inv. rate | 2.89 | +1.5 bp vs Feb 26 | results PDF | |
| Bill (reopening) | 4-Week | 912797TB3 | 3.686% inv. rate | 2.88 | 0.0 bp vs Feb 19 | results PDF | |
| Bill (reopening) | 4-Week | 912797TA5 | 3.686% inv. rate | 2.94 | −0.5 bp vs Feb 12 | results PDF | |
| Bill (reopening) | 4-Week | 912797SZ1 | 3.691% inv. rate | 2.78 | 0.0 bp vs Feb 5 | results PDF | |
| Bill (reopening) | 4-Week | 912797SY4 | 3.691% inv. rate | 2.85 | 0.0 bp vs Jan 29 | results PDF | |
| Bill (reopening) | 4-Week | 912797ST5 | 3.691% inv. rate | 2.86 | 0.0 bp vs Jan 22 | results PDF | |
| Bill (reopening) | 4-Week | 912797SS7 | 3.691% inv. rate | 2.86 | +3.6 bp vs Jan 15 | results PDF | |
| Bill (reopening) | 4-Week | 912797SR9 | 3.655% inv. rate | 2.92 | +4.6 bp vs Jan 8 | results PDF | |
| Bill (reopening) | 4-Week | 912797SQ1 | 3.609% inv. rate | 3.18 | −4.1 bp vs Dec 31 | results PDF | |
| Bill (reopening) | 4-Week | 912797SJ7 | 3.650% inv. rate | 2.90 | +2.0 bp vs Dec 24 | results PDF | |
| Bill (reopening) | 4-Week | 912797SH1 | 3.630% inv. rate | 3.14 | −1.0 bp vs Dec 18 | results PDF | |
| Bill (reopening) | 4-Week | 912797SG3 | 3.640% inv. rate | 3.28 | −3.0 bp vs Dec 11 | results PDF | |
| Bill (reopening) | 4-Week | 912797SF5 | 3.670% inv. rate | 2.97 | −7.2 bp vs Dec 4 | results PDF | |
| Bill (reopening) | 4-Week | 912797SE8 | 3.742% inv. rate | 2.69 | −22.9 bp vs Nov 26 | results PDF | |
| Bill (reopening) | 4-Week | 912797RZ2 | 3.971% inv. rate | 2.77 | +1.5 bp vs Nov 20 | results PDF | |
| Bill (reopening) | 4-Week | 912797RY5 | 3.956% inv. rate | 2.75 | −1.0 bp vs Nov 13 | results PDF | |
| Bill (reopening) | 4-Week | 912797RX7 | 3.966% inv. rate | 2.73 | +2.6 bp vs Nov 6 | results PDF | |
| Bill (reopening) | 4-Week | 912797RW9 | 3.940% inv. rate | 2.73 | −3.6 bp vs Oct 30 | results PDF | |
| Bill (reopening) | 4-Week | 912797RR0 | 3.976% inv. rate | 2.64 | −3.6 bp vs Oct 23 | results PDF | |
| Bill (reopening) | 4-Week | 912797RQ2 | 4.012% inv. rate | 2.73 | −8.7 bp vs Oct 16 | results PDF | |
| Bill (reopening) | 4-Week | 912797RP4 | 4.099% inv. rate | 2.79 | — | results PDF |
Source: U.S. Treasury Fiscal Data API, Treasury Securities Auctions Data, retrieved 2026-10-16 23:44 CDT; each row links to the official TreasuryDirect results PDF. Bills: investment rate (bond-equivalent) and discount rate. Notes/bonds: high yield and coupon. TIPS: high real yield (before inflation adjustment). FRNs: high discount margin. bp = basis points (0.01 percentage point). Change compares the headline rate with the prior auction of the same security type and term.
Download: 4-week-bill.csv
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