UMMGX vs. MBDFX

Last updated Jun 4, 2026

UMMGX (Columbia Bond Fund) and MBDFX (AMG GW&K Core Bond ESG Fund) are both Intermediate Core Bond funds. Their correlation of 0.86 suggests significant overlap in exposure. UMMGX charges 0.52%/yr vs 0.56%/yr for MBDFX.

Performance

UMMGX vs. MBDFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Bond Fund (UMMGX) and AMG GW&K Core Bond ESG Fund (MBDFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

UMMGX

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

MBDFX

• 1D: 0.00%
• 1M: 0.56%
• YTD: -0.05%
• 6M: -0.28%
• 1Y: 5.01%
• 3Y*: 3.84%
• 5Y*: -0.46%
• 10Y*: 1.27%

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

UMMGX vs. MBDFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
UMMGX Columbia Bond Fund	0.03%	8.03%	2.06%	6.73%	-15.66%	-0.79%	9.10%	9.23%	-0.50%	3.73%
MBDFX AMG GW&K Core Bond ESG Fund	-0.05%	7.29%	1.24%	5.73%	-13.85%	-3.34%	7.33%	9.70%	-1.11%	3.88%

Correlation

The correlation between UMMGX and MBDFX is 0.75, 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	0.75
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since May 3, 1993	0.86

The correlation between UMMGX and MBDFX shifts across timeframes, from 0.75 (1 year) to 0.93 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

UMMGX vs. MBDFX — Risk / Return Rank

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

MBDFX

MBDFX Risk / Return Rank: 19
MBDFX Sharpe Ratio Rank: 21
MBDFX Sortino Ratio Rank: 21
MBDFX Omega Ratio Rank: 20
MBDFX Calmar Ratio Rank: 18
MBDFX Martin Ratio Rank: 16

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.

UMMGX vs. MBDFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Bond Fund (UMMGX) and AMG GW&K Core Bond ESG Fund (MBDFX). 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	UMMGX	MBDFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	1.31	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	-0.07	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.25	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.48	—

Drawdowns

Drawdown Indicators

	UMMGX	MBDFX	Difference
Max Drawdown Largest peak-to-trough decline	—	-20.66%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-3.25%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-6.99%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-20.54%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-20.66%	—
Current Drawdown Current decline from peak	—	-4.51%	—
Average Drawdown Average peak-to-trough decline	—	-3.96%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.11%	—

Volatility

Volatility by Period

	UMMGX	MBDFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	1.35%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.79%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	3.87%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	6.15%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	5.06%	—

UMMGX vs. MBDFX - Expense Ratio Comparison

UMMGX has a 0.52% expense ratio, which is lower than MBDFX's 0.56% expense ratio.

Dividends

UMMGX vs. MBDFX - Dividend Comparison

UMMGX's dividend yield for the trailing twelve months is around 3.41%, less than MBDFX's 3.47% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MBDFX AMG GW&K Core Bond ESG Fund	3.47%	3.66%	3.50%	2.92%	2.16%	2.35%	1.84%	2.40%	2.30%	2.10%	2.06%	4.17%
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 UMMGX and MBDFX in my portfolio?

UMMGX and MBDFX have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.