MXBIX vs. UMMGX

Last updated Jun 5, 2026

MXBIX (Great-West Bond Index Fund) and UMMGX (Columbia Bond Fund) are both Intermediate Core Bond funds. A 0.75 correlation means they provide meaningful diversification when combined. MXBIX charges 0.50%/yr vs 0.52%/yr for UMMGX.

Performance

MXBIX vs. UMMGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Great-West Bond Index Fund (MXBIX) and Columbia Bond Fund (UMMGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

MXBIX

• 1D: -0.15%
• 1M: 0.08%
• YTD: 0.08%
• 6M: 0.08%
• 1Y: 4.05%
• 3Y*: 3.46%
• 5Y*: -0.50%
• 10Y*: 0.94%

UMMGX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

MXBIX vs. UMMGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MXBIX Great-West Bond Index Fund	0.08%	6.62%	0.82%	5.02%	-13.69%	-2.33%	7.10%	8.09%	-0.26%	2.56%
UMMGX Columbia Bond Fund	0.03%	8.03%	2.06%	6.73%	-15.66%	-0.79%	9.10%	9.23%	-0.50%	3.73%

Correlation

The correlation between MXBIX and UMMGX is 0.69, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.69
Correlation (3Y) Calculated over the trailing 3-year period	0.86
Correlation (5Y) Calculated over the trailing 5-year period	0.89
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Dec 1, 1992	0.75

The correlation between MXBIX and UMMGX shifts across timeframes, from 0.69 (1 year) to 0.89 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

MXBIX vs. UMMGX — Risk / Return Rank

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

MXBIX

MXBIX Risk / Return Rank: 21
MXBIX Sharpe Ratio Rank: 21
MXBIX Sortino Ratio Rank: 22
MXBIX Omega Ratio Rank: 20
MXBIX Calmar Ratio Rank: 23
MXBIX Martin Ratio Rank: 20

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.

MXBIX vs. UMMGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Great-West Bond Index Fund (MXBIX) and Columbia Bond Fund (UMMGX). 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.

	MXBIX	UMMGX	Difference
Sharpe ratio: Return per unit of total volatility	1.29	—	—
Sortino ratio: Return per unit of downside risk	1.92	—	—
Omega ratio: Gain probability vs. loss probability	1.23	—	—
Calmar ratio: Return relative to maximum drawdown	1.72	—	—
Martin ratio: Return relative to average drawdown	5.08	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	MXBIX	UMMGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.29	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.08	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.19	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.09	—	—

Drawdowns

Drawdown Indicators

	MXBIX	UMMGX	Difference
Max Drawdown Largest peak-to-trough decline	-19.74%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-2.87%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-6.35%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-18.70%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-19.74%	—	—
Current Drawdown Current decline from peak	-5.48%	—	—
Average Drawdown Average peak-to-trough decline	-5.88%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	0.95%	—	—

Volatility

Volatility by Period

	MXBIX	UMMGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.25%	—	—
Volatility (6M) Calculated over the trailing 6-month period	2.61%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	3.82%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.04%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.93%	—	—

MXBIX vs. UMMGX - Expense Ratio Comparison

MXBIX has a 0.50% expense ratio, which is lower than UMMGX's 0.52% expense ratio.

Dividends

MXBIX vs. UMMGX - Dividend Comparison

MXBIX's dividend yield for the trailing twelve months is around 2.77%, less than UMMGX's 3.41% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MXBIX Great-West Bond Index Fund	2.77%	2.78%	2.42%	1.98%	1.32%	1.51%	2.83%	1.06%	1.33%	0.70%	0.00%	0.00%
UMMGX Columbia Bond Fund	3.41%	4.20%	3.70%	3.73%	2.73%	1.76%	4.77%	4.21%	2.71%	1.88%	4.66%	3.56%

Frequently Asked Questions

Can I hold both MXBIX and UMMGX in my portfolio?

MXBIX and UMMGX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.