MXBIX vs. SSAFX
MXBIX (Great-West Bond Index Fund) and SSAFX (State Street Aggregate Bond Index Portfolio) are both Intermediate Core Bond funds. Over the past 10 years, MXBIX returned 0.82%/yr vs 27.62%/yr for SSAFX. Their correlation of 0.91 means they have usually moved in the same direction. MXBIX charges 0.50%/yr vs 0.02%/yr for SSAFX.
Performance
MXBIX vs. SSAFX - Performance Comparison
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Returns By Period
In the year-to-date period, MXBIX achieves a -0.23% return, which is significantly lower than SSAFX's 0.01% return. Over the past 10 years, MXBIX has underperformed SSAFX with an annualized return of 0.82%, while SSAFX has yielded a comparatively higher 27.62% annualized return.
MXBIX
- 1D
- 0.39%
- 1M
- -0.69%
- 6M
- -0.31%
- YTD
- -0.23%
- 1Y
- 1.83%
- 3Y*
- 3.68%
- 5Y*
- -0.88%
- 10Y*
- 0.82%
- ALL TIME*
- 0.49%
SSAFX
- 1D
- 0.41%
- 1M
- -0.65%
- 6M
- -0.04%
- YTD
- 0.01%
- 1Y
- 2.36%
- 3Y*
- 4.05%
- 5Y*
- -0.41%
- 10Y*
- 27.62%
- ALL TIME*
- 23.57%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
MXBIX vs. SSAFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MXBIX Great-West Bond Index Fund | -0.23% | 6.62% | 0.82% | 5.02% | -13.69% | -2.33% | 7.10% | 8.09% | -0.26% | 2.56% |
SSAFX State Street Aggregate Bond Index Portfolio | 0.01% | 6.81% | 1.34% | 5.61% | -13.30% | -1.72% | 978.57% | 8.69% | -0.12% | 3.38% |
Correlation
The correlation between MXBIX and SSAFX is 0.96 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.96 |
Correlation (3Y) Balances recent behavior with more history. | 0.91 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.93 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.91 |
Correlation (All Time) Calculated using the full available price history since Sep 22, 2014 | 0.91 |
The correlation between MXBIX and SSAFX has been stable across timeframes, ranging from 0.91 to 0.96 - a consistent structural relationship.
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Return for Risk
MXBIX vs. SSAFX — Risk / Return Rank
MXBIX
SSAFX
MXBIX vs. SSAFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Great-West Bond Index Fund (MXBIX) and State Street Aggregate Bond Index Portfolio (SSAFX). 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.
| MXBIX | SSAFX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.13 | ||
| Sortino ratioReturn per unit of downside risk | -0.18 | ||
| Omega ratioGain probability vs. loss probability | 1.09 | 1.11 | -0.02 |
| Calmar ratioReturn relative to maximum drawdown | 0.67 | 0.87 | -0.20 |
| Martin ratioReturn relative to average drawdown | 1.60 | 2.15 | -0.56 |
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Drawdowns
MXBIX vs. SSAFX - Drawdown Comparison
The maximum MXBIX drawdown since its inception was -19.74%, which is greater than SSAFX's maximum drawdown of -18.74%. Use the drawdown chart below to compare losses from any high point for MXBIX and SSAFX.
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Drawdown Indicators
| MXBIX | SSAFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.74% | -18.74% | -1.00% |
Max Drawdown (1Y)Largest decline over 1 year | -2.87% | -2.74% | -0.13% |
Max Drawdown (3Y)Largest decline over 3 years | -5.14% | -4.97% | -0.17% |
Max Drawdown (5Y)Largest decline over 5 years | -18.40% | -17.99% | -0.41% |
Max Drawdown (10Y)Largest decline over 10 years | -19.74% | -18.74% | -1.00% |
Current DrawdownCurrent decline from peak | -5.77% | -3.01% | -2.76% |
Average DrawdownAverage peak-to-trough decline | -5.88% | -4.39% | -1.49% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.20% | 1.11% | +0.09% |
Volatility
MXBIX vs. SSAFX - Volatility Comparison
Great-West Bond Index Fund (MXBIX) and State Street Aggregate Bond Index Portfolio (SSAFX) have volatilities of 1.12% and 1.10%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MXBIX | SSAFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.12% | 1.10% | +0.02% |
Volatility (6M)Calculated over the trailing 6-month period | 2.88% | 2.91% | -0.03% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.70% | 3.61% | +0.09% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.05% | 5.96% | +0.09% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.94% | 277.57% | -272.63% |
MXBIX vs. SSAFX - Expense Ratio Comparison
MXBIX has a 0.50% expense ratio, which is higher than SSAFX's 0.02% expense ratio.
Dividends
MXBIX vs. SSAFX - Dividend Comparison
MXBIX's dividend yield for the trailing twelve months is around 2.78%, less than SSAFX's 4.22% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MXBIX Great-West Bond Index Fund | 2.78% | 2.78% | 2.42% | 1.98% | 1.32% | 1.51% | 2.83% | 1.06% | 1.33% | 0.70% | 0.00% | 0.00% |
SSAFX State Street Aggregate Bond Index Portfolio | 4.22% | 3.70% | 3.76% | 3.16% | 2.49% | 1.90% | 2.41% | 2.88% | 2.82% | 2.42% | 2.21% | 3.21% |
Frequently Asked Questions
With a correlation of 0.96, MXBIX and SSAFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
MXBIX has higher volatility (1.12%) compared to SSAFX (1.10%). In terms of maximum drawdown, MXBIX dropped -19.74% vs SSAFX's -18.74%.
SSAFX currently has the higher Sharpe Ratio (0.66 vs 0.54), 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.
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