Compare ETFs
Fees, size, distributions, currency exposure and holdings overlap for two to four funds, side by side.
Side by side
| Measure | SMBSSchwab Mortgage-Backed Securities ETF | AGGiShares Core U.S. Aggregate Bond ETF |
|---|---|---|
| Market | USNYSE Arca | USNYSE Arca |
| Issuer | Schwab | iShares |
| Asset class | Fixed income · US | Fixed income · US |
| Expense ratio | 0.03%Expense ratio, filed 22 Dec 2025 | 0.03%Net expense ratio, filed 18 Jun 2026 |
| Net assets | $6.4BAs of 31 May 2026 | $136.5BAs of 31 May 2026 |
| Holdings | 4,197As of 31 May 2026 | 13,269As of 31 May 2026 |
| 12-month distribution yield | 5.38% | 4.16% |
| Distributions | Monthly$1.3090 in 12 months | Monthly$3.9660 in 12 months |
| Last price | $24.3120 Oct 2026, 19:59 UTC | $95.2720 Oct 2026, 20:00 UTC |
Holdings overlap
Weighted overlap is the sum, over the securities both funds hold, of the smaller of the two weights. 0% means no shared holdings; 100% means identical portfolios.
| Fund | SMBS | AGG |
|---|---|---|
| SMBS | Same fund | 6.1%at least |
| AGG | 6.1%at least | Same fund |
SMBS and AGG
- Weighted overlap
- 6.1%
- Holdings in common
- 219
- SMBS holdings also in AGG
- 11.0% by count
- AGG holdings also in SMBS
- 11.0% by count
| Holding | Weight in SMBS | Weight in AGG | Overlap | Matched by |
|---|---|---|---|---|
| Freddie MacFreddie Mac Pool US3132DWDC47 | 0.25% | 0.14% | 0.14% | ISIN |
| Fannie MaeFannie Mae Pool US31418D4X74 | 0.13% | 0.22% | 0.13% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US3618N5C569 | 0.19% | 0.12% | 0.12% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179WJR07 | 0.15% | 0.12% | 0.12% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179V7D62 | 0.19% | 0.11% | 0.11% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US3618N5A332 | 0.47% | 0.11% | 0.11% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179WFG87 | 0.09% | 0.14% | 0.09% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179WLP13 | 0.09% | 0.11% | 0.09% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179WY939 | 0.09% | 0.09% | 0.09% | ISIN |
| Government National Mortgage AssociationGinnie Mae II Pool US36179YFL39 | 0.07% | 0.09% | 0.07% | ISIN |
How overlap is measured
Each fund's latest public Form N-PORT report lists its positions with the percent of net assets each one makes up. For every security both funds hold, the smaller of its two weights is counted, and those are added up. If fund A holds a stock at 6% and fund B at 4%, that stock adds 4 percentage points.
Securities are matched by ISIN first, then by CUSIP (a US or Canadian ISIN contains the CUSIP), and only as a last resort by issuer name, for non-debt holdings where one fund gives no identifier. Repeated lines of the same security in one fund are added together, and each security is matched once.
Cash funds, repurchase agreements, derivative contracts and short positions are left out because their reported value is not comparable exposure. For funds with more than 2,000 positions only the largest 2,000 are stored, so the result is a lower bound and the possible extra is shown. Reports can be for different month ends, and funds trade between reports.
The count-based shares show how many of one fund's holdings the other also holds, which can be high even when overlap by weight is low. Read more in where the ETF data comes from.
Currency exposure
| Currency | SMBS | AGG |
|---|---|---|
| US dollar (USD) | 99.7% | 101.9% |