BBTBX vs. ETIRX

Last updated Jun 5, 2026

BBTBX (Bridge Builder Core Bond Fund) and ETIRX (Eventide Core Bond Fund) are both Intermediate Core Bond funds. Over the past 5 years, BBTBX returned 0.15%/yr vs -0.32%/yr for ETIRX. Their correlation of 0.91 suggests significant overlap in exposure. BBTBX charges 0.13%/yr vs 0.58%/yr for ETIRX.

Performance

BBTBX vs. ETIRX - Performance Comparison

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

Returns By Period

In the year-to-date period, BBTBX achieves a -0.08% return, which is significantly lower than ETIRX's 0.21% return.

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%

ETIRX

• 1D: -0.12%
• 1M: 0.12%
• YTD: 0.21%
• 6M: 0.55%
• 1Y: 4.98%
• 3Y*: 3.71%
• 5Y*: -0.32%
• 10Y*: —

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

BBTBX vs. ETIRX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
BBTBX Bridge Builder Core Bond Fund	-0.08%	7.82%	1.89%	5.41%	-13.49%	-1.12%	0.35%
ETIRX Eventide Core Bond Fund	0.21%	7.49%	0.40%	5.03%	-13.24%	-2.49%	-0.29%

Correlation

The correlation between BBTBX and ETIRX is 0.86, 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	0.86
Correlation (3Y) Calculated over the trailing 3-year period	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (All Time) Calculated using the full available price history since Aug 3, 2020	0.91

The correlation between BBTBX and ETIRX has been stable across timeframes, ranging from 0.86 to 0.92 - a consistent structural relationship.

Return for Risk

BBTBX vs. ETIRX — Risk / Return Rank

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

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

ETIRX

ETIRX Risk / Return Rank: 29
ETIRX Sharpe Ratio Rank: 28
ETIRX Sortino Ratio Rank: 29
ETIRX Omega Ratio Rank: 28
ETIRX Calmar Ratio Rank: 29
ETIRX Martin Ratio Rank: 27

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.

BBTBX vs. ETIRX - Risk-Adjusted Trends Comparison

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

	BBTBX	ETIRX	Difference
Sharpe ratio: Return per unit of total volatility	1.30	1.49	-0.19
Sortino ratio: Return per unit of downside risk	1.91	2.21	-0.30
Omega ratio: Gain probability vs. loss probability	1.23	1.27	-0.04
Calmar ratio: Return relative to maximum drawdown	1.80	1.97	-0.16
Martin ratio: Return relative to average drawdown	5.20	6.30	-1.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BBTBX vs. ETIRX - Sharpe Ratio Comparison

The current BBTBX Sharpe Ratio is 1.30, which is comparable to the ETIRX Sharpe Ratio of 1.49. The chart below compares the historical Sharpe Ratios of BBTBX and ETIRX, 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

	BBTBX	ETIRX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.30	1.49	-0.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.03	-0.06	+0.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.36	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	-0.14	+0.52

Drawdowns

BBTBX vs. ETIRX - Drawdown Comparison

The maximum BBTBX drawdown since its inception was -18.54%, roughly equal to the maximum ETIRX drawdown of -19.29%. Use the drawdown chart below to compare losses from any high point for BBTBX and ETIRX.

Drawdown Indicators

	BBTBX	ETIRX	Difference
Max Drawdown Largest peak-to-trough decline	-18.54%	-19.29%	+0.75%
Max Drawdown (1Y) Largest decline over 1 year	-2.97%	-2.87%	-0.10%
Max Drawdown (3Y) Largest decline over 3 years	-6.32%	-6.53%	+0.21%
Max Drawdown (5Y) Largest decline over 5 years	-18.54%	-18.37%	-0.17%
Max Drawdown (10Y) Largest decline over 10 years	-18.54%	—	—
Current Drawdown Current decline from peak	-1.61%	-4.18%	+2.57%
Average Drawdown Average peak-to-trough decline	-3.91%	-8.57%	+4.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.01%	0.89%	+0.12%

Volatility

BBTBX vs. ETIRX - Volatility Comparison

The current volatility for Bridge Builder Core Bond Fund (BBTBX) is 1.35%, while Eventide Core Bond Fund (ETIRX) has a volatility of 1.56%. This indicates that BBTBX experiences smaller price fluctuations and is considered to be less risky than ETIRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BBTBX	ETIRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.35%	1.56%	-0.21%
Volatility (6M) Calculated over the trailing 6-month period	2.94%	2.80%	+0.14%
Volatility (1Y) Calculated over the trailing 1-year period	4.13%	3.80%	+0.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.97%	5.52%	+0.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.94%	5.23%	-0.29%

BBTBX vs. ETIRX - Expense Ratio Comparison

BBTBX has a 0.13% expense ratio, which is lower than ETIRX's 0.58% expense ratio.

Dividends

BBTBX vs. ETIRX - Dividend Comparison

BBTBX's dividend yield for the trailing twelve months is around 4.08%, less than ETIRX's 4.15% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
ETIRX Eventide Core Bond Fund	4.15%	4.16%	2.78%	2.79%	2.32%	1.39%	0.40%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both BBTBX and ETIRX in my portfolio?

BBTBX and ETIRX have a correlation of 0.86, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BBTBX or ETIRX?

ETIRX has higher volatility (1.56%) compared to BBTBX (1.35%). In terms of maximum drawdown, BBTBX dropped -18.54% vs ETIRX's -19.29%.

Which has better risk-adjusted returns?

ETIRX currently has the higher Sharpe Ratio (1.49 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.