BBMUX vs. BBTBX

Last updated Jun 5, 2026

BBMUX (Bridge Builder Municipal Bond Fund) and BBTBX (Bridge Builder Core Bond Fund) are both mutual funds - BBMUX is a Municipal Bonds fund managed by Bridge Builder, while BBTBX is a Intermediate Core Bond fund managed by Bridge Builder. Over the past 10 years, BBMUX returned 2.06%/yr vs 1.79%/yr for BBTBX. A 0.51 correlation means they provide meaningful diversification when combined. BBMUX charges 0.15%/yr vs 0.13%/yr for BBTBX.

Performance

BBMUX vs. BBTBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Bridge Builder Municipal Bond Fund (BBMUX) and Bridge Builder Core Bond Fund (BBTBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BBMUX achieves a 1.13% return, which is significantly higher than BBTBX's -0.08% return. Over the past 10 years, BBMUX has outperformed BBTBX with an annualized return of 2.06%, while BBTBX has yielded a comparatively lower 1.79% annualized return.

BBMUX

• 1D: -0.10%
• 1M: 0.52%
• YTD: 1.13%
• 6M: 1.55%
• 1Y: 6.33%
• 3Y*: 3.80%
• 5Y*: 1.00%
• 10Y*: 2.06%

BBTBX

• 1D: -0.22%
• 1M: 0.16%
• YTD: -0.08%
• 6M: 0.07%
• 1Y: 4.47%
• 3Y*: 4.21%
• 5Y*: 0.15%
• 10Y*: 1.79%

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

BBMUX vs. BBTBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BBMUX Bridge Builder Municipal Bond Fund	1.13%	5.10%	1.50%	5.56%	-8.23%	2.04%	4.01%	7.15%	1.49%	4.75%
BBTBX Bridge Builder Core Bond Fund	-0.08%	7.82%	1.89%	5.41%	-13.49%	-1.12%	8.54%	9.15%	0.13%	4.14%

Correlation

The correlation between BBMUX and BBTBX is 0.60, 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	0.60
Correlation (3Y) Calculated over the trailing 3-year period	0.63
Correlation (5Y) Calculated over the trailing 5-year period	0.53
Correlation (10Y) Calculated over the trailing 10-year period	0.51
Correlation (All Time) Calculated using the full available price history since Sep 22, 2015	0.51

The correlation between BBMUX and BBTBX shifts across timeframes, from 0.51 (10 years) to 0.63 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

BBMUX vs. BBTBX — Risk / Return Rank

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

BBMUX

BBMUX Risk / Return Rank: 70
BBMUX Sharpe Ratio Rank: 87
BBMUX Sortino Ratio Rank: 92
BBMUX Omega Ratio Rank: 94
BBMUX Calmar Ratio Rank: 41
BBMUX Martin Ratio Rank: 37

BBTBX

BBTBX Risk / Return Rank: 21
BBTBX Sharpe Ratio Rank: 20
BBTBX Sortino Ratio Rank: 21
BBTBX Omega Ratio Rank: 19
BBTBX Calmar Ratio Rank: 24
BBTBX 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.

BBMUX vs. BBTBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Bridge Builder Municipal Bond Fund (BBMUX) and Bridge Builder Core Bond Fund (BBTBX). 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.

	BBMUX	BBTBX	Difference
Sharpe ratio: Return per unit of total volatility	2.84	1.30	+1.54
Sortino ratio: Return per unit of downside risk	4.60	1.91	+2.69
Omega ratio: Gain probability vs. loss probability	1.75	1.23	+0.52
Calmar ratio: Return relative to maximum drawdown	2.37	1.80	+0.57
Martin ratio: Return relative to average drawdown	7.98	5.20	+2.77
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BBMUX vs. BBTBX - Sharpe Ratio Comparison

The current BBMUX Sharpe Ratio is 2.84, which is higher than the BBTBX Sharpe Ratio of 1.30. The chart below compares the historical Sharpe Ratios of BBMUX and BBTBX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	BBMUX	BBTBX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.84	1.30	+1.54
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.31	0.03	+0.28
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.64	0.36	+0.27
Sharpe Ratio (All Time) Calculated using the full available price history	0.69	0.38	+0.32

Drawdowns

BBMUX vs. BBTBX - Drawdown Comparison

The maximum BBMUX drawdown since its inception was -12.65%, smaller than the maximum BBTBX drawdown of -18.54%. Use the drawdown chart below to compare losses from any high point for BBMUX and BBTBX.

Drawdown Indicators

	BBMUX	BBTBX	Difference
Max Drawdown Largest peak-to-trough decline	-12.65%	-18.54%	+5.89%
Max Drawdown (1Y) Largest decline over 1 year	-2.85%	-2.97%	+0.12%
Max Drawdown (3Y) Largest decline over 3 years	-4.18%	-6.32%	+2.14%
Max Drawdown (5Y) Largest decline over 5 years	-12.65%	-18.54%	+5.89%
Max Drawdown (10Y) Largest decline over 10 years	-12.65%	-18.54%	+5.89%
Current Drawdown Current decline from peak	-0.74%	-1.61%	+0.87%
Average Drawdown Average peak-to-trough decline	-2.27%	-3.91%	+1.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.84%	1.01%	-0.17%

Volatility

BBMUX vs. BBTBX - Volatility Comparison

The current volatility for Bridge Builder Municipal Bond Fund (BBMUX) is 0.92%, while Bridge Builder Core Bond Fund (BBTBX) has a volatility of 1.35%. This indicates that BBMUX experiences smaller price fluctuations and is considered to be less risky than BBTBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BBMUX	BBTBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.92%	1.35%	-0.43%
Volatility (6M) Calculated over the trailing 6-month period	1.82%	2.94%	-1.12%
Volatility (1Y) Calculated over the trailing 1-year period	2.39%	4.13%	-1.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.24%	5.97%	-2.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.25%	4.94%	-1.69%

BBMUX vs. BBTBX - Expense Ratio Comparison

BBMUX has a 0.15% expense ratio, which is higher than BBTBX's 0.13% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

BBMUX vs. BBTBX - Dividend Comparison

BBMUX's dividend yield for the trailing twelve months is around 3.37%, less than BBTBX's 4.08% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BBMUX Bridge Builder Municipal Bond Fund	3.37%	3.61%	2.81%	2.21%	1.82%	1.93%	2.10%	2.61%	2.35%	1.95%	0.35%	0.06%
BBTBX Bridge Builder Core Bond Fund	4.08%	4.58%	3.92%	2.86%	2.26%	2.38%	4.73%	3.39%	3.02%	2.67%	0.95%	0.17%

Frequently Asked Questions

Can I hold both BBMUX and BBTBX in my portfolio?

BBMUX and BBTBX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BBMUX or BBTBX?

BBTBX has higher volatility (1.35%) compared to BBMUX (0.92%). In terms of maximum drawdown, BBMUX dropped -12.65% vs BBTBX's -18.54%.

Which has better risk-adjusted returns?

BBMUX currently has the higher Sharpe Ratio (2.84 vs 1.30), 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.