What Is the AGG ETF? A Complete Guide to Returns, Fees, Holdings, and Alternative ETFs
The iShares Core U.S. Aggregate Bond ETF (AGG) is a core bond holding that broadly diversifies across U.S. investment-grade bonds. Its strengths are an ultra-low expense ratio, monthly dividends, and steady distributions, and differences in fees, issuer, and AUM versus BND, SCHZ, and SPAB are the key selection criteria.
SubscribeWhat Is the iShares Core U.S. Aggregate Bond ETF?
This is a passive ETF managed by BlackRock iShares that tracks the Bloomberg U.S. Aggregate Bond Index. It automatically provides market-cap-weighted, diversified exposure across the U.S. investment-grade bond market, including Treasuries, corporate bonds, and MBS.
It suits asset allocation investors who want to balance volatility against their equity holdings, as well as long-term core investors who want broad diversification across U.S. investment-grade bonds in a single holding.
It is an ETF run by BlackRock iShares using a passive (index-tracking) approach.
How Does the iShares Core U.S. Aggregate Bond ETF Invest?
| Item | Details |
|---|---|
| Tracked Index | Bloomberg U.S. Aggregate Bond Index |
| Management Style | Passive (index-tracking) |
| Coverage | U.S. investment-grade Treasuries, corporate bonds, and MBS |
| Dividend Frequency | Monthly dividends |
| Expense Ratio | 0.03% |
| Issuer | BlackRock iShares |
The fund uses a passive strategy designed to track the entire U.S. investment-grade bond market, holding Treasuries, government-guaranteed bonds, corporate bonds, and MBS on a market-cap-weighted basis. Because its duration is in the intermediate range, it carries some exposure to interest rate changes.
- The aggregate bond ETF in the iShares Core lineup
- An ultra-low-cost core bond holding
- Monthly distributions provide stable cash flow
iShares Core U.S. Aggregate Bond ETF Size and Costs (AUM and Expense Ratio)
Assets under management (AUM) stand at $139.2B, and the expense ratio is 0.03% per year.
BND, SCHZ, and SPAB, shown in the table, track the same Bloomberg Aggregate Bond Index and are direct substitutes, with fees and issuer lineup being the main differences. FBND is an active bond ETF, and IAGG is a variant that tracks global bonds outside the U.S., so their exposure structures differ.
iShares Core U.S. Aggregate Bond ETF Performance and Trends
1-Year Price Performance
Dividend & Yield
52-Week Price RangeDuring periods of rising rates, bond prices fell in response to moves in the benchmark rate and Treasury yields, while in phases of rate holds and cuts, bond prices tended to recover.
It belongs to the group of mega bond ETFs that see steady fund flows, driven by demand for hedging equity volatility. In volatile markets, inflows can also stand out as investors shift toward safe-haven assets.
iShares Core U.S. Aggregate Bond ETF Pros and Cons
Its main strengths are an ultra-low expense ratio, monthly distributions, and broad diversification across U.S. investment-grade bonds, while price declines in rising-rate periods and inflation risk should be considered in advance.
💪 Key Strengths
⚠️ Points to Watch
Alternative ETFs and Related Products to the iShares Core U.S. Aggregate Bond ETF
BND, SCHZ, and SPAB, shown in the table, track the same Bloomberg Aggregate Bond Index and are direct substitutes, with fees and issuer lineup being the main differences. FBND is an actively managed variant, and IAGG offers global bond exposure outside the U.S. In addition, you can also consider variants such as SHY and BSV to focus only on short-term bonds, TLT for long-term bond exposure only, TIP for inflation-linked bonds, and LQD to concentrate on corporate bonds only.
Peer Comparison ETFs| Ticker | Name | Price | Change | AUM | Total Expense Ratio | Dividend Yield | 1Y |
|---|---|---|---|---|---|---|---|
 BND | Vanguard Total Bond Market ETF | $71.27 | +0.1% | $165.8B | 0.03% | 4.12% | -5.0% |
 FBND | Fidelity Total Bond ETF | $44.10 | +0.1% | $28.4B | 0.36% | 4.79% | -5.7% |
 IAGG | iShares International Aggregate Bond Fund | $49.41 | +0.1% | $12.6B | 0.07% | 5.2% | -4.5% |
 SCHZ | Schwab US Aggregate Bond ETF | $22.45 | +0.1% | $10.8B | 0.03% | 4.29% | -5.2% |
 SPAB | State Street SPDR Portfolio Aggregate Bond ETF | $24.73 | +0.1% | $10.4B | 0.03% | 4.22% | -5.2% |
Top Holdings| Ticker | Name | Weight | Price | Change | Market Cap | P/E | Dividend Yield |
|---|---|---|---|---|---|---|---|
 USLM | United States Lime & Minerals Inc | 0.04% | $109.65 | -1.8% | $3.1B | 23.5 | 0.22% |
iShares Core U.S. Aggregate Bond ETF Investor Checkpoints
Here are the points to review before investing in AGG. Broad diversification across U.S. investment-grade bonds is its strength, but it is advisable to double-check rising rate risk, inflation, and currency effects before buying, and to review duration and asset allocation weighting together.
| Checkpoint | What to Check | Current Status |
|---|---|---|
| 💵 Expense Ratio | Check the impact of long-term cumulative costs | Among the lowest |
| 📊 Duration | Check interest rate sensitivity | Intermediate range |
| 💸 Monthly Distributions | Plan for using the cash flow | Paid monthly |
| 💱 Exchange Rate | Impact on returns converted to won | No currency hedge applied |
Rising rates, inflation, and exchange rate fluctuations are the main drivers of short-term volatility and real returns. In a strong rate-hike cycle, even a bond ETF can suffer short-term losses, so it is necessary to review duration and asset allocation weighting together.
As a core holding with broad diversification across U.S. investment-grade bonds, it is regarded as a standard choice. If fees are the priority, BND and SCHZ are suitable variants; for shorter duration, SHY and BSV; for long-term exposure, TLT; and for an inflation hedge, TIP.
SubscribeDisclaimer: This content is for informational purposes only and does not constitute investment advice. All investment responsibility lies with the investor.
This article reflects information as of May 21, 2026.
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