iShares Core US Aggregate Bond ETF (AGG)
Top ETFs · Bonds · US Aggregate · data since 2003-09-29 · last close 2026-09-09
iShares Core US Aggregate Bond ETF (AGG) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.3 | 1.6 | -1.8 | 0.2 | 0.3 | 0.3 | -1.6 | 0.0 | -0.4 | · | · | · |
| 2025 | 0.5 | 2.2 | -0.0 | 0.4 | -0.6 | 1.5 | -0.3 | 1.2 | 1.1 | 0.6 | 0.6 | -0.3 |
| 2024 | -0.1 | -1.5 | 0.9 | -2.5 | 1.7 | 0.9 | 2.4 | 1.5 | 1.3 | -2.5 | 1.1 | -1.7 |
| 2023 | 3.3 | -2.7 | 2.6 | 0.6 | -1.1 | -0.4 | -0.0 | -0.6 | -2.6 | -1.6 | 4.6 | 3.7 |
| 2022 | -2.0 | -1.1 | -2.8 | -3.8 | 0.8 | -1.6 | 2.5 | -3.0 | -4.2 | -1.3 | 3.8 | -0.9 |
| 2021 | -0.7 | -1.5 | -1.1 | 0.7 | 0.2 | 0.8 | 1.1 | -0.2 | -0.9 | -0.0 | 0.3 | -0.4 |
| 2020 | 2.0 | 1.6 | -0.5 | 1.7 | 0.7 | 0.7 | 1.3 | -0.8 | -0.1 | -0.6 | 1.2 | 0.1 |
| 2019 | 0.9 | -0.1 | 2.1 | -0.2 | 1.9 | 1.1 | 0.2 | 2.8 | -0.6 | 0.2 | -0.0 | -0.1 |
| 2018 | -1.1 | -1.0 | 0.7 | -0.9 | 0.7 | 0.1 | -0.0 | 0.6 | -0.6 | -0.6 | 0.8 | 2.0 |
| 2017 | 0.2 | 0.7 | -0.1 | 0.9 | 0.7 | -0.0 | 0.3 | 0.9 | -0.6 | 0.1 | -0.1 | 0.5 |
| 2016 | 1.2 | 0.9 | 0.9 | 0.3 | 0.0 | 1.9 | 0.5 | -0.2 | 0.1 | -0.8 | -2.6 | 0.3 |
| 2015 | 2.0 | -0.9 | 0.4 | -0.3 | -0.4 | -1.1 | 0.9 | -0.3 | 0.8 | 0.1 | -0.4 | -0.2 |
| 2014 | 1.5 | 0.4 | -0.1 | 0.8 | 1.2 | -0.1 | -0.3 | 1.1 | -0.6 | 1.1 | 0.7 | 0.1 |
| 2013 | -0.6 | 0.6 | 0.1 | 1.0 | -2.0 | -1.6 | 0.3 | -0.8 | 1.1 | 0.8 | -0.3 | -0.6 |
| 2012 | 0.7 | -0.0 | -0.6 | 0.9 | 1.1 | -0.0 | 1.4 | 0.0 | 0.3 | -0.1 | 0.3 | -0.3 |
| 2011 | -0.1 | 0.3 | -0.2 | 1.6 | 1.2 | -0.5 | 1.7 | 1.5 | 0.8 | 0.1 | -0.3 | 1.4 |
| 2010 | 1.4 | 0.2 | -0.0 | 1.0 | 1.1 | 1.8 | 0.8 | 1.3 | 0.0 | 0.1 | -0.8 | -0.7 |
| 2009 | -2.0 | -1.1 | 1.1 | 0.5 | 0.7 | 0.4 | 1.3 | 1.2 | 1.2 | 0.2 | 1.3 | -1.9 |
| 2008 | 2.3 | -0.2 | 0.1 | 0.3 | -1.3 | -0.2 | 0.4 | 0.7 | -1.8 | -2.3 | 3.0 | 6.7 |
| 2007 | -0.1 | 1.6 | -0.2 | 0.6 | -0.9 | -0.4 | 1.1 | 1.3 | 0.6 | 1.0 | 1.8 | -0.0 |
| 2006 | -0.1 | 0.2 | -0.9 | -0.1 | -0.2 | -0.2 | 1.4 | 1.6 | 1.0 | 0.7 | 1.1 | -0.6 |
| 2005 | 0.5 | -0.4 | -1.0 | 1.7 | 0.8 | 0.9 | -1.0 | 1.2 | -0.9 | -1.0 | 0.4 | 1.1 |
| 2004 | 0.4 | 1.1 | 0.7 | -2.8 | -0.4 | 0.7 | 0.9 | 1.6 | 0.5 | 0.9 | -0.7 | 0.8 |
| 2003 | · | · | · | · | · | · | · | · | 0.5 | -0.9 | 0.3 | 1.0 |
| Avg | 0.5 | 0.0 | 0.0 | 0.1 | 0.3 | 0.2 | 0.7 | 0.5 | -0.2 | -0.2 | 0.7 | 0.4 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
AGG seasonality — average by calendar month
iShares Core US Aggregate Bond ETF has monthly history back to 2003. Its strongest month by median is August — positive in 16 of 23 years, median +0.9%, and higher in 5 of the last 9. March is the soft spot, down in 13 of 23 with a median of -0.0%. Across its full record it has closed 59% of months higher, swings ±1.3% in an average month and has fallen 18.4% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | +0.5% | +0.0% | +0.0% | +0.1% | +0.3% | +0.2% | +0.7% | +0.5% | -0.1% | -0.3% | +0.7% | +0.4% |
| Win rate | 61%/23 | 52%/23 | 43%/23 | 70%/23 | 65%/23 | 52%/23 | 74%/23 | 70%/23 | 57%/23 | 52%/23 | 65%/23 | 48%/23 |
Win rate = share of positive months / sample size.
AGG risk & extremes
AGG drawdown & rolling returns
Percent below the all-time high at each month-end — how far underwater the asset was.
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Frequently asked questions
What was iShares Core US Aggregate Bond ETF's best month?+
iShares Core US Aggregate Bond ETF's strongest completed month on record is December 2008, at +6.66%.
What was iShares Core US Aggregate Bond ETF's worst month?+
Its weakest completed month on record is September 2022, at -4.15%.
Is iShares Core US Aggregate Bond ETF up this year?+
iShares Core US Aggregate Bond ETF is down 1.27% year to date, measured from its last close before 1 January.
What is iShares Core US Aggregate Bond ETF's 1-year return?+
-0.33% 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 iShares Core US Aggregate Bond ETF's biggest drawdown?+
The deepest peak-to-trough fall on record is 18.4%, measured on month-end closes since 2003.
Which calendar month is historically best for iShares Core US Aggregate Bond ETF?+
November has the highest average return across every completed November since 2003. An average is not a forecast.
About iShares Core US Aggregate Bond ETF
iShares Core US Aggregate Bond ETF is an us aggregate business worth about $138 billion. Tracked here from its first session onward — every monthly, quarterly and weekly return on record since 2003, with no gaps filled in and nothing smoothed. Since 2003 it has ground out +96% overall — not every story is a rocket.
Did you know?
- Its best month on record was December 2008 at +6.66%; its worst, September 2022 at -4.15%.
- It has closed July in the green 17 out of 23 times — past performance, future shrug.
Trivia for entertainment — the numbers come from our price data; the jokes don't.