VMBSX vs. CPXIX
VMBSX (Vanguard Mortgage-Backed Securities Index Fund Admiral Shares) and CPXIX (Cohen & Steers Preferred Securities and Income Fund, Inc.) are both mutual funds - VMBSX is a Total Bond Market fund managed by Vanguard, while CPXIX is a Preferred Stock/Convertible Bonds fund managed by Cohen & Steers. Over the past 10 years, VMBSX returned 1.87%/yr vs 4.62%/yr for CPXIX. At a 0.24 correlation, their price movements are largely independent. VMBSX charges 0.07%/yr vs 0.84%/yr for CPXIX.
Performance
VMBSX vs. CPXIX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, VMBSX achieves a 0.81% return, which is significantly lower than CPXIX's 1.58% return. Over the past 10 years, VMBSX has underperformed CPXIX with an annualized return of 1.87%, while CPXIX has yielded a comparatively higher 4.62% annualized return.
VMBSX
- 1D
- 0.00%
- 1M
- 0.46%
- YTD
- 0.81%
- 6M
- 0.99%
- 1Y
- 6.98%
- 3Y*
- 4.69%
- 5Y*
- 0.55%
- 10Y*
- 1.87%
CPXIX
- 1D
- -0.08%
- 1M
- 0.26%
- YTD
- 1.58%
- 6M
- 2.14%
- 1Y
- 7.83%
- 3Y*
- 9.59%
- 5Y*
- 2.70%
- 10Y*
- 4.62%
VMBSX vs. CPXIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VMBSX Vanguard Mortgage-Backed Securities Index Fund Admiral Shares | 0.81% | 8.43% | 1.76% | 4.99% | -11.56% | -1.35% | 3.74% | 11.47% | 0.87% | 2.32% |
CPXIX Cohen & Steers Preferred Securities and Income Fund, Inc. | 1.58% | 8.44% | 10.39% | 6.38% | -12.37% | 2.75% | 6.47% | 18.11% | -4.65% | 10.88% |
Correlation
The correlation between VMBSX and CPXIX is 0.40, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.40 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.41 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.37 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.27 |
Correlation (All Time) Calculated using the full available price history since May 6, 2010 | 0.24 |
The correlation between VMBSX and CPXIX shifts across timeframes, from 0.24 (all time) to 0.41 (3 years), reflecting how their relationship changes across market environments.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
VMBSX vs. CPXIX — Risk / Return Rank
VMBSX
CPXIX
VMBSX vs. CPXIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) and Cohen & Steers Preferred Securities and Income Fund, Inc. (CPXIX). 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.
| VMBSX | CPXIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.49 | ||
| Sortino ratioReturn per unit of downside risk | -2.38 | ||
| Omega ratioGain probability vs. loss probability | 1.34 | 1.82 | -0.47 |
| Calmar ratioReturn relative to maximum drawdown | 2.63 | 2.72 | -0.09 |
| Martin ratioReturn relative to average drawdown | 8.86 | 12.42 | -3.56 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading charts...
Sharpe Ratios by Period
| VMBSX | CPXIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.84 | 3.33 | -1.49 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.09 | 0.58 | -0.49 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.39 | 0.75 | -0.37 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.59 | 1.17 | -0.58 |
Drawdowns
VMBSX vs. CPXIX - Drawdown Comparison
The maximum VMBSX drawdown since its inception was -17.44%, smaller than the maximum CPXIX drawdown of -25.56%. Use the drawdown chart below to compare losses from any high point for VMBSX and CPXIX.
Loading charts...
Drawdown Indicators
| VMBSX | CPXIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.44% | -25.56% | +8.12% |
Max Drawdown (1Y)Largest decline over 1 year | -2.67% | -3.00% | +0.33% |
Max Drawdown (3Y)Largest decline over 3 years | -7.53% | -3.91% | -3.62% |
Max Drawdown (5Y)Largest decline over 5 years | -17.12% | -20.00% | +2.88% |
Max Drawdown (10Y)Largest decline over 10 years | -17.44% | -25.56% | +8.12% |
Current DrawdownCurrent decline from peak | -1.22% | -0.09% | -1.13% |
Average DrawdownAverage peak-to-trough decline | -2.48% | -2.69% | +0.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.79% | 0.65% | +0.14% |
Volatility
VMBSX vs. CPXIX - Volatility Comparison
Vanguard Mortgage-Backed Securities Index Fund Admiral Shares (VMBSX) has a higher volatility of 1.46% compared to Cohen & Steers Preferred Securities and Income Fund, Inc. (CPXIX) at 0.80%. This indicates that VMBSX's price experiences larger fluctuations and is considered to be riskier than CPXIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| VMBSX | CPXIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.46% | 0.80% | +0.66% |
Volatility (6M)Calculated over the trailing 6-month period | 2.73% | 2.09% | +0.64% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.82% | 2.45% | +1.37% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.40% | 4.70% | +1.70% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.86% | 6.16% | -1.30% |
VMBSX vs. CPXIX - Expense Ratio Comparison
VMBSX has a 0.07% expense ratio, which is lower than CPXIX's 0.84% expense ratio.
Dividends
VMBSX vs. CPXIX - Dividend Comparison
VMBSX's dividend yield for the trailing twelve months is around 4.16%, less than CPXIX's 5.78% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CPXIX Cohen & Steers Preferred Securities and Income Fund, Inc. | 5.78% | 5.54% | 5.52% | 5.76% | 5.40% | 4.89% | 5.17% | 5.30% | 5.88% | 5.01% | 5.75% | 5.91% |
VMBSX Vanguard Mortgage-Backed Securities Index Fund Admiral Shares | 4.16% | 4.18% | 4.24% | 3.28% | 2.31% | 0.99% | 2.00% | 7.48% | 2.72% | 2.16% | 1.98% | 2.01% |
Frequently Asked Questions
VMBSX and CPXIX have a correlation of 0.40, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VMBSX has higher volatility (1.46%) compared to CPXIX (0.80%). In terms of maximum drawdown, VMBSX dropped -17.44% vs CPXIX's -25.56%.
CPXIX currently has the higher Sharpe Ratio (3.33 vs 1.84), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
Find the right allocation for VMBSX and CPXIX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer