MXMDX vs. MXISX
MXMDX (Great-West S&P Mid Cap 400 Index Fund) and MXISX (Great-West S&P Small Cap 600 Index Fund) are both mutual funds - MXMDX is a Mid Cap Blend Equities fund managed by Great-West, while MXISX is a Small Cap Blend Equities fund managed by Great-West. Over the past 10 years, MXMDX returned 9.83%/yr vs 9.95%/yr for MXISX. Their correlation of 0.93 means they have usually moved in the same direction. MXMDX charges 0.55%/yr vs 0.56%/yr for MXISX.
Performance
MXMDX vs. MXISX - Performance Comparison
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Returns By Period
In the year-to-date period, MXMDX achieves a 15.47% return, which is significantly lower than MXISX's 23.16% return. Both investments have delivered pretty close results over the past 10 years, with MXMDX having a 9.83% annualized return and MXISX not far ahead at 9.95%.
MXMDX
- 1D
- 1.08%
- 1M
- -0.08%
- 6M
- 9.84%
- YTD
- 15.47%
- 1Y
- 21.94%
- 3Y*
- 13.37%
- 5Y*
- 8.25%
- 10Y*
- 9.83%
- ALL TIME*
- 9.01%
MXISX
- 1D
- 1.66%
- 1M
- 0.89%
- 6M
- 15.47%
- YTD
- 23.16%
- 1Y
- 35.22%
- 3Y*
- 13.62%
- 5Y*
- 7.35%
- 10Y*
- 9.95%
- ALL TIME*
- 4.99%
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 |
MXMDX vs. MXISX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MXMDX Great-West S&P Mid Cap 400 Index Fund | 15.47% | 6.90% | 13.23% | 15.75% | -13.60% | 24.25% | 12.84% | 25.48% | -12.02% | 15.01% |
MXISX Great-West S&P Small Cap 600 Index Fund | 23.16% | 5.53% | 7.87% | 14.61% | -16.60% | 26.08% | 10.73% | 21.46% | -9.22% | 11.80% |
Correlation
The correlation between MXMDX and MXISX is 0.92, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.92 |
Correlation (3Y) Balances recent behavior with more history. | 0.95 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.96 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.95 |
Correlation (All Time) Calculated using the full available price history since Jan 20, 2011 | 0.93 |
The correlation between MXMDX and MXISX has been stable across timeframes, ranging from 0.92 to 0.96 - a consistent structural relationship.
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Return for Risk
MXMDX vs. MXISX — Risk / Return Rank
MXMDX
MXISX
MXMDX vs. MXISX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Great-West S&P Mid Cap 400 Index Fund (MXMDX) and Great-West S&P Small Cap 600 Index Fund (MXISX). 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.
| MXMDX | MXISX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.66 | ||
| Sortino ratioReturn per unit of downside risk | -0.94 | ||
| Omega ratioGain probability vs. loss probability | 1.26 | 1.37 | -0.11 |
| Calmar ratioReturn relative to maximum drawdown | 2.47 | 4.07 | -1.60 |
| Martin ratioReturn relative to average drawdown | 8.93 | 13.98 | -5.04 |
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Drawdowns
MXMDX vs. MXISX - Drawdown Comparison
The maximum MXMDX drawdown since its inception was -41.80%, smaller than the maximum MXISX drawdown of -70.66%. Use the drawdown chart below to compare losses from any high point for MXMDX and MXISX.
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Drawdown Indicators
| MXMDX | MXISX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -41.80% | -70.66% | +28.86% |
Max Drawdown (1Y)Largest decline over 1 year | -8.87% | -8.75% | -0.12% |
Max Drawdown (3Y)Largest decline over 3 years | -24.15% | -28.07% | +3.92% |
Max Drawdown (5Y)Largest decline over 5 years | -24.15% | -28.07% | +3.92% |
Max Drawdown (10Y)Largest decline over 10 years | -41.80% | -44.78% | +2.98% |
Current DrawdownCurrent decline from peak | -1.30% | -0.31% | -0.99% |
Average DrawdownAverage peak-to-trough decline | -5.90% | -21.75% | +15.85% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.47% | 2.55% | -0.08% |
Volatility
MXMDX vs. MXISX - Volatility Comparison
The current volatility for Great-West S&P Mid Cap 400 Index Fund (MXMDX) is 3.57%, while Great-West S&P Small Cap 600 Index Fund (MXISX) has a volatility of 3.76%. This indicates that MXMDX experiences smaller price fluctuations and is considered to be less risky than MXISX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MXMDX | MXISX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.57% | 3.76% | -0.19% |
Volatility (6M)Calculated over the trailing 6-month period | 11.54% | 11.73% | -0.19% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.39% | 17.12% | -1.73% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.93% | 21.61% | -1.68% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.17% | 23.81% | -2.64% |
MXMDX vs. MXISX - Expense Ratio Comparison
MXMDX has a 0.55% expense ratio, which is lower than MXISX's 0.56% expense ratio.
Dividends
MXMDX vs. MXISX - Dividend Comparison
MXMDX's dividend yield for the trailing twelve months is around 5.77%, less than MXISX's 6.05% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MXISX Great-West S&P Small Cap 600 Index Fund | 6.05% | 7.45% | 4.53% | 2.41% | 6.55% | 10.79% | 6.55% | 6.71% | 14.30% | 8.68% | 4.94% | 10.96% |
MXMDX Great-West S&P Mid Cap 400 Index Fund | 5.77% | 6.66% | 3.04% | 4.76% | 4.35% | 5.24% | 5.74% | 3.74% | 8.13% | 4.51% | 0.00% | 0.00% |
Frequently Asked Questions
With a correlation of 0.92, MXMDX and MXISX 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.
MXISX has higher volatility (3.76%) compared to MXMDX (3.57%). In terms of maximum drawdown, MXMDX dropped -41.80% vs MXISX's -70.66%.
MXISX currently has the higher Sharpe Ratio (2.08 vs 1.42), 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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