SPDR Bloomberg 1-3 Month T-Bill ETF (BIL)

Bonds · T-Bills · data since 2007-05-30 · last close 2026-10-02

Latest available close Oct 2, 2026Data updated Oct 3, 2026, 02:52 UTCMarket Exchange session close
1d
+0.02%
Rank 670 of 4,867
7d
+0.08%
30d
+0.32%
YTD
+2.11%
1y
+3.07%

SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) monthly returns (%)

YearJanFebMarAprMayJunJulAugSepOctNovDec
20260.30.30.30.30.30.30.3-0.00.00.1··
20250.30.30.30.30.40.30.40.40.30.30.30.3
20240.40.40.40.40.50.40.50.50.40.40.40.4
20230.30.30.40.40.40.50.40.50.40.40.50.4
20220.0-0.00.1-0.00.00.10.00.20.20.20.30.4
20210.0-0.0-0.00.0-0.0-0.0-0.0-0.00.0-0.0-0.00.0
20200.10.10.2-0.0-0.00.00.00.0-0.00.0-0.00.0
20190.20.20.20.20.20.20.20.20.20.20.10.1
20180.10.10.10.10.10.10.10.20.10.20.20.2
20170.00.1-0.00.10.00.10.00.10.10.10.10.1
20160.00.00.00.00.0-0.00.00.00.00.0-0.00.0
2015-0.00.00.0-0.0-0.00.00.00.0-0.0-0.00.0-0.0
20140.00.0-0.00.00.0-0.0-0.00.00.0-0.00.0-0.0
20130.00.00.0-0.00.0-0.00.00.0-0.0-0.0-0.00.0
2012-0.00.0-0.00.00.0-0.00.00.00.00.0-0.00.0
20110.00.00.00.00.00.00.00.0-0.0-0.00.0-0.0
20100.0-0.00.0-0.00.00.0-0.00.00.00.00.0-0.0
20090.20.0-0.00.10.0-0.0-0.10.10.00.0-0.00.0
20080.40.20.2-0.10.10.20.20.10.5-0.2-0.10.0
2007····0.00.40.40.40.20.40.40.2
Avg0.10.10.10.10.10.10.10.10.10.10.10.1
Median0.00.00.00.00.00.10.00.00.00.00.00.0

October so far: +0.1% against an average of +0.1% and a median of +0.0% across 19 completed Octobers, 12 of them positive.

Values in %. Current and first-listed months are partial (greyed) and are left out of the Avg and Median rows.

returnsview.com

BIL seasonality — average by calendar month

SPDR Bloomberg 1-3 Month T-Bill ETF has monthly history back to 2007. January carries the highest average at +0.1%, but the median January is +0.0% and 11 of 19 have finished green: +0% in 2024 does most of the lifting. The steadier month is June — positive in 11 of 20 years, median +0.1%, and higher in 7 of the last 9. Across its full record it has closed 58% of months higher, swings ±0.2% in an average month and has fallen 0.8% peak to trough.

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Avg+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%+0.1%
Win rate58%/1958%/1947%/1953%/1965%/2055%/2060%/2055%/2060%/2068%/1953%/1963%/19

Win rate = share of positive months / sample size.

BIL risk & extremes

Max drawdown
-0.8%
Worst peak-to-trough fall on record
Monthly volatility
±0.2%
Std. dev. of monthly returns
Positive months
58%
Share of completed months in the green
Best month
+0.51%
2008-09
Worst month
-0.23%
2008-10
Longest streaks
51▲ / 14▼
Consecutive up / down months

BIL drawdown & rolling returns

0%0%0%

Percent below the all-time high at each month-end — how far underwater the asset was.

Related stocks

Vanguard Total Bond Market ETF (BND)iShares Core US Aggregate Bond ETF (AGG)Vanguard Total International Bond ETF (BNDX)Vanguard Intermediate-Term Corporate Bond ETF (VCIT)iShares 20+ Year Treasury Bond ETF (TLT)iShares National Muni Bond ETF (MUB)

Frequently asked questions

What was SPDR Bloomberg 1-3 Month T-Bill ETF's best month?+

SPDR Bloomberg 1-3 Month T-Bill ETF's strongest completed month on record is September 2008, at +0.51%.

What was SPDR Bloomberg 1-3 Month T-Bill ETF's worst month?+

Its weakest completed month on record is October 2008, at -0.23%.

Is SPDR Bloomberg 1-3 Month T-Bill ETF up this year?+

SPDR Bloomberg 1-3 Month T-Bill ETF is up 2.11% year to date, measured from its last close before 1 January.

What is SPDR Bloomberg 1-3 Month T-Bill ETF's 1-year return?+

+3.07% over the past twelve months, comparing the latest close with the most recent close on or before the same date a year earlier.

What is SPDR Bloomberg 1-3 Month T-Bill ETF's biggest drawdown?+

The deepest peak-to-trough fall on record is 0.8%, measured on month-end closes since 2007.

Which calendar month is historically best for SPDR Bloomberg 1-3 Month T-Bill ETF?+

January has the highest average return across every completed January since 2007. An average is not a forecast.

About SPDR Bloomberg 1-3 Month T-Bill ETF

SPDR Bloomberg 1-3 Month T-Bill ETF is a t-bills business worth about $47 billion. Tracked here from its first session onward — every monthly, quarterly and weekly return on record since 2007, with no gaps filled in and nothing smoothed. Since 2007 it has ground out +30% overall — not every story is a rocket.

Did you know?

  • Its best month on record was September 2008 at +0.51%; its worst, October 2008 at -0.23%.

Trivia for entertainment — the numbers come from our price data; the jokes don't.