VMBS vs. ASEC
VMBS (Vanguard Mortgage-Backed Securities ETF) and ASEC (American Century Securitized Credit ETF) are both Mortgage Backed Securities funds. VMBS is passively managed, while ASEC is actively managed. Their 0.02 correlation means their historical movements had little consistent relationship. VMBS charges 0.04%/yr vs 0.29%/yr for ASEC.
Performance
VMBS vs. ASEC - Performance Comparison
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Returns By Period
VMBS
- 1D
- -0.41%
- 1M
- -1.18%
- 6M
- -0.45%
- YTD
- -0.12%
- 1Y
- 3.32%
- 3Y*
- 4.53%
- 5Y*
- 0.25%
- 10Y*
- 1.21%
- ALL TIME*
- 2.03%
ASEC
- 1D
- 0.04%
- 1M
- 0.19%
- 6M
- —
- YTD
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
- ALL TIME*
- —
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $679.57 | $2.96K | $422.99K | |
| $62.70M | $62.14M | $62.59M |
VMBS vs. ASEC - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
VMBS Vanguard Mortgage-Backed Securities ETF | -0.72% |
ASEC American Century Securitized Credit ETF | 0.13% |
Correlation
The correlation between VMBS and ASEC is 0.02, meaning there was essentially no consistent relationship between their historical price movements. Each responded to its own set of market drivers.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since May 28, 2026 | 0.02 |
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Return for Risk
VMBS vs. ASEC — Risk / Return Rank
VMBS
ASEC
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
VMBS vs. ASEC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Mortgage-Backed Securities ETF (VMBS) and American Century Securitized Credit ETF (ASEC). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| VMBS | ASEC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | 1.18 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 1.61 | — | — |
| Martin ratioReturn relative to average drawdown | 4.60 | — | — |
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Drawdowns
VMBS vs. ASEC - Drawdown Comparison
The maximum VMBS drawdown since its inception was -17.47%, which is greater than ASEC's maximum drawdown of -0.46%. Use the drawdown chart below to compare losses from any high point for VMBS and ASEC.
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Drawdown Indicators
| VMBS | ASEC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.47% | -0.46% | -17.01% |
Max Drawdown (1Y)Largest decline over 1 year | -2.68% | — | — |
Max Drawdown (3Y)Largest decline over 3 years | -6.41% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -17.09% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -17.47% | — | — |
Current DrawdownCurrent decline from peak | -2.09% | -0.26% | -1.83% |
Average DrawdownAverage peak-to-trough decline | -2.48% | -0.18% | -2.30% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.94% | — | — |
Volatility
VMBS vs. ASEC - Volatility Comparison
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Volatility by Period
| VMBS | ASEC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.17% | — | — |
Volatility (6M)Calculated over the trailing 6-month period | 3.42% | — | — |
Volatility (1Y)Calculated over the trailing 1-year period | 4.29% | 1.83% | +2.46% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.80% | 1.83% | +4.97% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.42% | 1.83% | +3.59% |
VMBS vs. ASEC - Expense Ratio Comparison
VMBS has a 0.04% expense ratio, which is lower than ASEC's 0.29% expense ratio.
Dividends
VMBS vs. ASEC - Dividend Comparison
VMBS's dividend yield for the trailing twelve months is around 4.24%, more than ASEC's 0.45% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ASEC American Century Securitized Credit ETF | 0.45% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
VMBS Vanguard Mortgage-Backed Securities ETF | 3.88% | 4.20% | 3.94% | 3.31% | 2.35% | 1.02% | 2.01% | 2.77% | 2.72% | 2.16% | 2.10% | 2.12% |
Frequently Asked Questions
VMBS and ASEC have a correlation of 0.02, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, VMBS is cheaper at 0.04% per year. The better choice depends on whether you care most about return, fees, risk, or income.
VMBS is cheaper with a 0.04% expense ratio, compared with 0.29% for ASEC.
VMBS has the higher dividend yield at 3.88%, compared with 0.45% for ASEC.
They also come from different issuers: Vanguard and American Century. Their fees differ too: 0.04% for VMBS and 0.29% for ASEC.
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