MXFDX vs. MXISX

Last updated Jun 12, 2026

MXFDX (Great-West Core Bond Fund) and MXISX (Great-West S&P Small Cap 600 Index Fund) are both mutual funds - MXFDX is a Intermediate Core Bond fund managed by Great-West, while MXISX is a Small Cap Blend Equities fund managed by Great-West. Over the past 10 years, MXFDX returned 1.34%/yr vs 9.61%/yr for MXISX. At a correlation of -0.08, they often move in opposite directions. MXFDX charges 0.70%/yr vs 0.56%/yr for MXISX.

Performance

MXFDX vs. MXISX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Great-West Core Bond Fund (MXFDX) and Great-West S&P Small Cap 600 Index Fund (MXISX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MXFDX achieves a -0.20% return, which is significantly lower than MXISX's 15.41% return. Over the past 10 years, MXFDX has underperformed MXISX with an annualized return of 1.34%, while MXISX has yielded a comparatively higher 9.61% annualized return.

MXFDX

• 1D: -0.10%
• 1M: 0.00%
• YTD: -0.20%
• 6M: -0.00%
• 1Y: 4.14%
• 3Y*: 3.78%
• 5Y*: -0.46%
• 10Y*: 1.34%

MXISX

• 1D: -0.73%
• 1M: 2.19%
• YTD: 15.41%
• 6M: 11.06%
• 1Y: 28.76%
• 3Y*: 12.70%
• 5Y*: 5.03%
• 10Y*: 9.61%

*Multi-year figures are annualized to reflect compound growth (CAGR)

MXFDX vs. MXISX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MXFDX Great-West Core Bond Fund	-0.20%	6.76%	1.52%	6.20%	-14.70%	-1.56%	8.02%	9.19%	-1.12%	3.27%
MXISX Great-West S&P Small Cap 600 Index Fund	15.41%	5.53%	7.87%	14.61%	-16.60%	26.08%	10.73%	21.46%	-9.22%	11.80%

Correlation

The correlation between MXFDX and MXISX is 0.32, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.32
Correlation (3Y) Calculated over the trailing 3-year period	0.27
Correlation (5Y) Calculated over the trailing 5-year period	0.16
Correlation (10Y) Calculated over the trailing 10-year period	0.03
Correlation (All Time) Calculated using the full available price history since May 22, 2003	-0.08

The correlation between MXFDX and MXISX shifts across timeframes, from -0.08 (all time) to 0.32 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MXFDX vs. MXISX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

MXFDX

MXFDX Risk / Return Rank: 27
MXFDX Sharpe Ratio Rank: 29
MXFDX Sortino Ratio Rank: 30
MXFDX Omega Ratio Rank: 28
MXFDX Calmar Ratio Rank: 27
MXFDX Martin Ratio Rank: 22

MXISX

MXISX Risk / Return Rank: 59
MXISX Sharpe Ratio Rank: 47
MXISX Sortino Ratio Rank: 52
MXISX Omega Ratio Rank: 43
MXISX Calmar Ratio Rank: 83
MXISX Martin Ratio Rank: 71

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

MXFDX vs. MXISX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Great-West Core Bond Fund (MXFDX) 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.

	MXFDX	MXISX	Difference
Sharpe ratio: Return per unit of total volatility	1.22	1.68	-0.46
Sortino ratio: Return per unit of downside risk	1.83	2.47	-0.64
Omega ratio: Gain probability vs. loss probability	1.22	1.29	-0.07
Calmar ratio: Return relative to maximum drawdown	1.56	3.35	-1.79
Martin ratio: Return relative to average drawdown	4.42	11.21	-6.78

MXFDX vs. MXISX - Sharpe Ratio Comparison

The current MXFDX Sharpe Ratio is 1.22, which is comparable to the MXISX Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of MXFDX and MXISX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

MXFDX vs. MXISX - Drawdown Comparison

The maximum MXFDX drawdown since its inception was -19.90%, smaller than the maximum MXISX drawdown of -70.66%. Use the drawdown chart below to compare losses from any high point for MXFDX and MXISX.

Drawdown Indicators

	MXFDX	MXISX	Difference
Max Drawdown Largest peak-to-trough decline	-19.90%	-70.66%	+50.76%
Max Drawdown (1Y) Largest decline over 1 year	-2.98%	-8.75%	+5.77%
Max Drawdown (3Y) Largest decline over 3 years	-6.63%	-28.07%	+21.44%
Max Drawdown (5Y) Largest decline over 5 years	-19.88%	-28.07%	+8.19%
Max Drawdown (10Y) Largest decline over 10 years	-19.90%	-44.78%	+24.88%
Current Drawdown Current decline from peak	-3.55%	-1.00%	-2.55%
Average Drawdown Average peak-to-trough decline	-4.24%	-21.84%	+17.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.03%	2.58%	-1.55%

Volatility

MXFDX vs. MXISX - Volatility Comparison

The current volatility for Great-West Core Bond Fund (MXFDX) is 1.22%, while Great-West S&P Small Cap 600 Index Fund (MXISX) has a volatility of 4.80%. This indicates that MXFDX 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.

Volatility by Period

	MXFDX	MXISX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.22%	4.80%	-3.58%
Volatility (6M) Calculated over the trailing 6-month period	2.68%	11.91%	-9.23%
Volatility (1Y) Calculated over the trailing 1-year period	3.81%	17.46%	-13.65%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.35%	21.76%	-15.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.36%	23.86%	-18.50%

MXFDX vs. MXISX - Expense Ratio Comparison

MXFDX has a 0.70% expense ratio, which is higher than MXISX's 0.56% expense ratio.

Dividends

MXFDX vs. MXISX - Dividend Comparison

MXFDX's dividend yield for the trailing twelve months is around 2.88%, less than MXISX's 6.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MXFDX Great-West Core Bond Fund	2.88%	2.87%	3.23%	2.18%	1.21%	2.62%	3.08%	2.41%	2.40%	1.42%	0.00%	0.00%
MXISX Great-West S&P Small Cap 600 Index Fund	6.46%	7.45%	4.53%	2.41%	6.55%	10.79%	6.55%	6.71%	14.30%	8.68%	4.94%	10.96%

Frequently Asked Questions

Can I hold both MXFDX and MXISX in my portfolio?

MXFDX and MXISX 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.

Which is riskier, MXFDX or MXISX?

MXISX has higher volatility (4.80%) compared to MXFDX (1.22%). In terms of maximum drawdown, MXFDX dropped -19.90% vs MXISX's -70.66%.

Which has better risk-adjusted returns?

MXISX currently has the higher Sharpe Ratio (1.68 vs 1.22), 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.