ASEC vs. CMBS
ASEC (American Century Securitized Credit ETF) and CMBS (iShares CMBS ETF) are both Mortgage Backed Securities funds. ASEC is actively managed, while CMBS is passively managed. Their 0.32 correlation means their historical movements had little consistent relationship. ASEC charges 0.29%/yr vs 0.25%/yr for CMBS.
Performance
ASEC vs. CMBS - Performance Comparison
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Returns By Period
ASEC
- 1D
- 0.06%
- 1M
- -0.05%
- 6M
- —
- YTD
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
- ALL TIME*
- —
CMBS
- 1D
- 0.07%
- 1M
- -0.47%
- 6M
- 0.02%
- YTD
- 0.29%
- 1Y
- 3.35%
- 3Y*
- 5.35%
- 5Y*
- 0.56%
- 10Y*
- 1.86%
- ALL TIME*
- 2.36%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $734.43 | $3.06K | $464.20K | |
CMBS iShares CMBS ETF | $1.41M | $1.26M | $1.86M |
ASEC vs. CMBS - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
ASEC American Century Securitized Credit ETF | -0.09% |
CMBS iShares CMBS ETF | -0.03% |
Correlation
The correlation between ASEC and CMBS is 0.32, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since May 28, 2026 | 0.32 |
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Return for Risk
ASEC vs. CMBS — Risk / Return Rank
ASEC
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
CMBS
ASEC vs. CMBS - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Century Securitized Credit ETF (ASEC) and iShares CMBS ETF (CMBS). 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.
| ASEC | CMBS | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.16 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.38 | — |
| Martin ratioReturn relative to average drawdown | — | 3.27 | — |
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Drawdowns
ASEC vs. CMBS - Drawdown Comparison
The maximum ASEC drawdown since its inception was -0.46%, smaller than the maximum CMBS drawdown of -15.87%. Use the drawdown chart below to compare losses from any high point for ASEC and CMBS.
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Drawdown Indicators
| ASEC | CMBS | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -0.46% | -15.87% | +15.41% |
Max Drawdown (1Y)Largest decline over 1 year | — | -2.44% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -3.19% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -15.83% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -15.87% | — |
Current DrawdownCurrent decline from peak | -0.20% | -1.63% | +1.43% |
Average DrawdownAverage peak-to-trough decline | -0.18% | -2.94% | +2.76% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 1.03% | — |
Volatility
ASEC vs. CMBS - Volatility Comparison
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Volatility by Period
| ASEC | CMBS | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.06% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 2.89% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 1.39% | 3.64% | -2.25% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.39% | 5.33% | -3.94% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 1.39% | 5.76% | -4.37% |
ASEC vs. CMBS - Expense Ratio Comparison
ASEC has a 0.29% expense ratio, which is higher than CMBS's 0.25% expense ratio.
Dividends
ASEC vs. CMBS - Dividend Comparison
ASEC's dividend yield for the trailing twelve months is around 0.46%, less than CMBS's 3.61% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ASEC American Century Securitized Credit ETF | 0.46% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
CMBS iShares CMBS ETF | 3.61% | 3.45% | 3.31% | 2.97% | 2.65% | 2.46% | 2.83% | 2.74% | 2.70% | 2.50% | 2.29% | 2.31% |
Frequently Asked Questions
ASEC and CMBS have a correlation of 0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, CMBS is cheaper at 0.25% per year. The better choice depends on whether you care most about return, fees, risk, or income.
CMBS is cheaper with a 0.25% expense ratio, compared with 0.29% for ASEC.
CMBS has the higher dividend yield at 3.61%, compared with 0.46% for ASEC.
They also come from different issuers: American Century and iShares. Their fees differ too: 0.29% for ASEC and 0.25% for CMBS.
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