Compare
iShares Core U.S. Aggregate Bond ETF vs Vanguard Total Bond Market Index Fund, side by side on every metric on file. 70 of 99 differ — fees, returns, holdings, sector exposure and tracking.
Both funds charge the same 0.03% a year.
Over the past year AGG returned the most at -2.11%, against -2.14% for BND. Those are price returns — distributions are not in them — and last year says nothing about the next one.
BND is the largest at $386.76B in net assets, and the portfolios are spread differently: AGG holds 13,390 positions against 10,042 for BND.
| Metric | AGG iShares Core U.S. Aggregate Bond ETF | BND Vanguard Total Bond Market Index Fund |
|---|---|---|
| Profile | ||
| Category | Fixed Income | Fixed Income |
| Tags | Index Fund | Index Fund |
| Geography | US | Global |
| Family | iShares Trust | VANGUARD BOND INDEX FUNDS |
| Structure | Lends Securities | — |
| Fees | ||
| AFFE | 0.00% | — |
| Gross Expense | 0.03% | 0.03% |
| Min. Investment | — | $3.0K |
| Net Expense | 0.03% | 0.03% |
| Size | ||
| AUM | $136.46B | $386.76B |
| Returns | ||
| 2021 | -1.67% | -1.66% |
| 2022 | -13.1% | -13.2% |
| 2023 | 5.58% | 5.70% |
| 2024 | 1.37% | 1.34% |
| 2025 | 7.19% | 7.11% |
| 10Y Ann. (Prospectus) | 1.97% | — |
| 5Y Ann. (Prospectus) | -0.38% | — |
| Since Inception (Prospectus) | — | — |
| Worst Quarter (Prospectus) | -5.86% | -5.94% |
| 1M | -0.42% | -0.45% |
| 1Y | -2.11% | -2.14% |
| 3M | -1.53% | -1.51% |
| 3Y Ann. | 0.49% | 0.51% |
| 5Y Ann. | -3.43% | -3.51% |
| 6M | -3.86% | -3.80% |
| YTD | -2.39% | -2.38% |
| Total 12M | 5.13% | 4.24% |
| Total 1M | 0.30% | -1.75% |
| Total 3M | -1.33% | 0.01% |
| Total 6M | 0.22% | 0.97% |
| Market Cap | ||
| Large Cap | — | — |
| Cap Coverage | — | — |
| Mega Cap | — | — |
| Micro Cap | — | — |
| Mid Cap | — | — |
| Size Style | — | — |
| Small Cap | — | — |
| Avg Mkt Cap | — | — |
| Valuation | ||
| Look-Through Yield | — | — |
| EV/EBITDA | — | — |
| P/E | — | — |
| P/S | — | — |
| Asset Mix | ||
| Derivatives | 0.00% | 0.00% |
| Equity | 0.00% | 0.00% |
| Fixed Income | 95.2% | 98.7% |
| Fund & Cash | 4.83% | 1.35% |
| Other Assets | 0.00% | 0.00% |
| Sector | ||
| Basic Materials | 0.38% | 0.47% |
| Communication Services | 45.7% | 49.0% |
| Consumer Discretionary | 0.94% | 1.07% |
| Consumer Staples | 1.03% | 0.97% |
| Energy | 1.21% | 1.35% |
| Financial Services | 4.69% | 4.96% |
| Healthcare | 2.16% | 2.25% |
| Industrials | 1.68% | 1.83% |
| Other / Unclass. | 28.2% | 33.4% |
| Real Estate | 5.89% | 0.73% |
| Technology | 6.86% | 2.55% |
| Utilities | 1.27% | 1.44% |
| Top Sector | Communication Services | Communication Services |
| Top Sector % | 63.6% | 73.5% |
| Bond Character | ||
| Corporate | 25.0% | 33.2% |
| Municipal | 0.47% | 0.47% |
| Non-US Sovereign | 2.11% | 2.81% |
| Agency & GSE | 23.0% | 1.29% |
| Treasury | 44.5% | 47.8% |
| Geography | ||
| US Weight | 94.9% | 79.6% |
| Top Country | United States | United States |
| Portfolio | ||
| Holdings | 13,390 | 10,042 |
| Short | 2.05% | 0.37% |
| Concentration | ||
| Effective Holdings | 457 | 376 |
| Top 10 | 7.88% | 10.4% |
| Largest Position | 2.77% | 1.42% |
| Top Holding | BLACKROCK CASH CL INST SL AGENCY | Federal National Mortgage Assn. |
| Flows | ||
| Positive Months | 76.2% | 88.9% |
| Flow 12M % | 8.54% | 8.09% |
| Flow 12M | $11.65B | $31.28B |
| Flow 1M % | 0.83% | -0.32% |
| Flow 3M % | -0.54% | 1.54% |
| Cost of Ownership | ||
| Fund Age | 22.9 | 10.2 |
| Turnover | 62.0% | 38.0% |
| Risk | ||
| Spread HY | $0 | -$391.2K |
| Spread IG | $10.6M | -$46.3M |
| DV01 10Y | $2 | -$2 |
| Liabilities % | 3.39% | 1.29% |
| Tracking Diff. | -0.02% | -0.18% |
| Tracking Error | 0.42% | 0.78% |
| Identity | ||
| CIK | 1100663 | 1004655 |
| Class ID | C000012092 | C000046844 |
| Share Class | iShares Core U.S. Aggregate Bond ETF | ETF Shares |
| Data | Holdings, Flows, AUM, Returns, Profile, Prices | Holdings, Flows, AUM, Returns, Profile, Prices |
| Flows Date | 31 May 2026 | 31 Mar 2026 |
| Portfolio Date | 27 Aug 2026 | 31 Jul 2026 |
| AUM Date | 31 May 2026 | 31 Mar 2026 |
| Price Date | 28 Aug 2026 | 28 Aug 2026 |
| Returns Date | 18 Jun 2026 | 28 Apr 2026 |
| Prospectus Date | 29 Jun 2026 | 28 Apr 2026 |
| Series ID | S000004362 | S000002564 |
| Total Ret. Date | 31 May 2026 | 31 Mar 2026 |
Yes — each charges 0.03% a year. On cost there is nothing to choose between them.
Of the 99 metrics on file for both, 70 differ and the rest match. The table below lists the differences first; untick “only what differs” to see everything, including what they agree on.
Over the last twelve months AGG returned -2.11% and BND returned -2.14%. Those are price returns measured to the last close on file and exclude distributions, so a fund paying a larger yield looks worse on this line than it was. Past performance is not a forecast, and one year is a short window.
Nothing stops you, but check the overlap first: the sector and holdings rows below show how much of each portfolio is the same securities in the same weights. Two funds tracking the same index are one position held twice, not diversification. This page reports the numbers and does not give investment advice.