GBIAX vs. UMMGX

Last updated Jun 4, 2026

GBIAX (Nationwide Bond Index Fund) and UMMGX (Columbia Bond Fund) are both Intermediate Core Bond funds. Their correlation of 0.92 suggests significant overlap in exposure. GBIAX charges 0.64%/yr vs 0.52%/yr for UMMGX.

Performance

GBIAX vs. UMMGX - Performance Comparison

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

Returns By Period

GBIAX

• 1D: 0.10%
• 1M: 0.50%
• YTD: 0.24%
• 6M: 0.10%
• 1Y: 4.84%
• 3Y*: 3.37%
• 5Y*: -0.54%
• 10Y*: 0.88%

UMMGX

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

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

GBIAX vs. UMMGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GBIAX Nationwide Bond Index Fund	0.24%	6.54%	0.44%	5.03%	-14.06%	-2.38%	6.60%	8.08%	-0.74%	2.89%
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 GBIAX and UMMGX is 0.81, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Dec 30, 1999	0.92

The correlation between GBIAX and UMMGX shifts across timeframes, from 0.81 (1 year) to 0.95 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

GBIAX vs. UMMGX — Risk / Return Rank

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

GBIAX

GBIAX Risk / Return Rank: 18
GBIAX Sharpe Ratio Rank: 19
GBIAX Sortino Ratio Rank: 19
GBIAX Omega Ratio Rank: 18
GBIAX Calmar Ratio Rank: 19
GBIAX Martin Ratio Rank: 18

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.

GBIAX vs. UMMGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Nationwide Bond Index Fund (GBIAX) 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.

	GBIAX	UMMGX	Difference
Sharpe ratio Return per unit of total volatility	1.24	—	—
Sortino ratio Return per unit of downside risk	1.84	—	—
Omega ratio Gain probability vs. loss probability	1.22	—	—
Calmar ratio Return relative to maximum drawdown	1.62	—	—
Martin ratio Return relative to average drawdown	4.80	—	—
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

	GBIAX	UMMGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.24	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.09	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.18	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.73	—	—

Drawdowns

Drawdown Indicators

	GBIAX	UMMGX	Difference
Max Drawdown Largest peak-to-trough decline	-20.26%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-3.00%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-6.30%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-19.07%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-20.26%	—	—
Current Drawdown Current decline from peak	-6.18%	—	—
Average Drawdown Average peak-to-trough decline	-3.04%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	1.01%	—	—

Volatility

Volatility by Period

	GBIAX	UMMGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.30%	—	—
Volatility (6M) Calculated over the trailing 6-month period	2.77%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	3.93%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.00%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.95%	—	—

GBIAX vs. UMMGX - Expense Ratio Comparison

GBIAX has a 0.64% expense ratio, which is higher than UMMGX's 0.52% expense ratio.

Dividends

GBIAX vs. UMMGX - Dividend Comparison

GBIAX's dividend yield for the trailing twelve months is around 3.28%, less than UMMGX's 3.41% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
GBIAX Nationwide Bond Index Fund	3.28%	3.18%	3.07%	2.57%	1.59%	3.02%	1.79%	2.27%	2.29%	1.93%	2.15%	2.43%
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 GBIAX and UMMGX in my portfolio?

GBIAX and UMMGX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.