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. At a 0.21 correlation, their price movements are largely independent. 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
- 0.10%
- 1M
- 0.32%
- 6M
- —
- YTD
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
CMBS
- 1D
- -0.19%
- 1M
- 0.31%
- 6M
- 0.43%
- YTD
- 0.55%
- 1Y
- 3.82%
- 3Y*
- 5.84%
- 5Y*
- 0.67%
- 10Y*
- 1.92%
ASEC vs. CMBS - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
ASEC American Century Securitized Credit ETF | 0.10% |
CMBS iShares CMBS ETF | 0.23% |
Correlation
The correlation between ASEC and CMBS is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since May 28, 2026 | 0.21 |
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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 | — | 1.18 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.57 | — |
| Martin ratioReturn relative to average drawdown | — | 3.99 | — |
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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 | — | -3.25% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -15.87% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -15.87% | — |
Current DrawdownCurrent decline from peak | 0.00% | -1.37% | +1.37% |
Average DrawdownAverage peak-to-trough decline | -0.19% | -2.94% | +2.75% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 0.96% | — |
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 | — | 0.99% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 2.80% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 1.39% | 3.67% | -2.28% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.39% | 5.32% | -3.93% |
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 0.45%, less than CMBS's 3.60% 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% |
CMBS iShares CMBS ETF | 3.60% | 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 0.21, 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 3.60%, compared with 0.45% 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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