BCAIX vs. TBGVX

Last updated Jun 4, 2026

BCAIX (Boston Common ESG Impact International Fund) and TBGVX (Tweedy, Browne International Value Fund) are both Foreign Large Cap Equities funds. Over the past 10 years, BCAIX returned 7.01%/yr vs 7.93%/yr for TBGVX. Their correlation of 0.80 suggests significant overlap in exposure. BCAIX charges 0.86%/yr vs 1.40%/yr for TBGVX.

Performance

BCAIX vs. TBGVX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Boston Common ESG Impact International Fund (BCAIX) and Tweedy, Browne International Value Fund (TBGVX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with BCAIX having a 9.78% return and TBGVX slightly higher at 10.01%. Over the past 10 years, BCAIX has underperformed TBGVX with an annualized return of 7.01%, while TBGVX has yielded a comparatively higher 7.93% annualized return.

BCAIX

• 1D: 0.44%
• 1M: 4.76%
• YTD: 9.78%
• 6M: 12.09%
• 1Y: 20.14%
• 3Y*: 11.98%
• 5Y*: 3.51%
• 10Y*: 7.01%

TBGVX

• 1D: 0.26%
• 1M: 4.41%
• YTD: 10.01%
• 6M: 11.76%
• 1Y: 19.01%
• 3Y*: 13.56%
• 5Y*: 8.20%
• 10Y*: 7.93%

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

BCAIX vs. TBGVX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BCAIX Boston Common ESG Impact International Fund	9.78%	25.22%	0.55%	11.55%	-21.86%	3.41%	18.56%	23.74%	-13.46%	26.39%
TBGVX Tweedy, Browne International Value Fund	10.01%	23.86%	2.47%	12.48%	-7.52%	15.62%	-1.00%	14.64%	-6.72%	15.03%

Correlation

The correlation between BCAIX and TBGVX is 0.63, 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	0.63
Correlation (3Y) Calculated over the trailing 3-year period	0.74
Correlation (5Y) Calculated over the trailing 5-year period	0.80
Correlation (10Y) Calculated over the trailing 10-year period	0.79
Correlation (All Time) Calculated using the full available price history since Dec 30, 2010	0.80

The correlation between BCAIX and TBGVX shifts across timeframes, from 0.63 (1 year) to 0.80 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BCAIX vs. TBGVX — Risk / Return Rank

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

BCAIX

BCAIX Risk / Return Rank: 20
BCAIX Sharpe Ratio Rank: 19
BCAIX Sortino Ratio Rank: 18
BCAIX Omega Ratio Rank: 18
BCAIX Calmar Ratio Rank: 19
BCAIX Martin Ratio Rank: 25

TBGVX

TBGVX Risk / Return Rank: 38
TBGVX Sharpe Ratio Rank: 45
TBGVX Sortino Ratio Rank: 44
TBGVX Omega Ratio Rank: 46
TBGVX Calmar Ratio Rank: 28
TBGVX Martin Ratio Rank: 26

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.

BCAIX vs. TBGVX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Common ESG Impact International Fund (BCAIX) and Tweedy, Browne International Value Fund (TBGVX). 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.

	BCAIX	TBGVX	Difference
Sharpe ratio: Return per unit of total volatility	1.24	1.96	-0.73
Sortino ratio: Return per unit of downside risk	1.80	2.77	-0.98
Omega ratio: Gain probability vs. loss probability	1.22	1.37	-0.14
Calmar ratio: Return relative to maximum drawdown	1.60	1.97	-0.38
Martin ratio: Return relative to average drawdown	6.13	6.35	-0.22
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BCAIX vs. TBGVX - Sharpe Ratio Comparison

The current BCAIX Sharpe Ratio is 1.24, which is lower than the TBGVX Sharpe Ratio of 1.96. The chart below compares the historical Sharpe Ratios of BCAIX and TBGVX, 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

	BCAIX	TBGVX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.24	1.96	-0.73
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.21	0.74	-0.53
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.42	0.63	-0.21
Sharpe Ratio (All Time) Calculated using the full available price history	0.31	0.75	-0.43

Drawdowns

BCAIX vs. TBGVX - Drawdown Comparison

The maximum BCAIX drawdown since its inception was -37.34%, smaller than the maximum TBGVX drawdown of -50.97%. Use the drawdown chart below to compare losses from any high point for BCAIX and TBGVX.

Drawdown Indicators

	BCAIX	TBGVX	Difference
Max Drawdown Largest peak-to-trough decline	-37.34%	-50.97%	+13.63%
Max Drawdown (1Y) Largest decline over 1 year	-12.15%	-9.56%	-2.59%
Max Drawdown (3Y) Largest decline over 3 years	-16.34%	-11.45%	-4.89%
Max Drawdown (5Y) Largest decline over 5 years	-37.34%	-17.71%	-19.63%
Max Drawdown (10Y) Largest decline over 10 years	-37.34%	-31.18%	-6.16%
Current Drawdown Current decline from peak	0.00%	-1.59%	+1.59%
Average Drawdown Average peak-to-trough decline	-9.65%	-6.08%	-3.57%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.16%	2.96%	+0.20%

Volatility

BCAIX vs. TBGVX - Volatility Comparison

Boston Common ESG Impact International Fund (BCAIX) has a higher volatility of 5.10% compared to Tweedy, Browne International Value Fund (TBGVX) at 2.73%. This indicates that BCAIX's price experiences larger fluctuations and is considered to be riskier than TBGVX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BCAIX	TBGVX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.10%	2.73%	+2.37%
Volatility (6M) Calculated over the trailing 6-month period	12.71%	7.78%	+4.93%
Volatility (1Y) Calculated over the trailing 1-year period	15.71%	9.61%	+6.10%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.65%	11.11%	+5.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.65%	12.67%	+3.98%

BCAIX vs. TBGVX - Expense Ratio Comparison

BCAIX has a 0.86% expense ratio, which is lower than TBGVX's 1.40% expense ratio.

Dividends

BCAIX vs. TBGVX - Dividend Comparison

BCAIX's dividend yield for the trailing twelve months is around 3.48%, less than TBGVX's 11.01% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BCAIX Boston Common ESG Impact International Fund	3.48%	3.82%	2.73%	2.32%	1.26%	3.34%	0.63%	2.25%	1.42%	1.18%	1.61%	1.10%
TBGVX Tweedy, Browne International Value Fund	11.01%	12.11%	9.95%	4.55%	5.68%	8.89%	0.94%	1.88%	6.74%	1.10%	3.16%	4.94%

Frequently Asked Questions

Can I hold both BCAIX and TBGVX in my portfolio?

BCAIX and TBGVX have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BCAIX or TBGVX?

BCAIX has higher volatility (5.10%) compared to TBGVX (2.73%). In terms of maximum drawdown, BCAIX dropped -37.34% vs TBGVX's -50.97%.

Which has better risk-adjusted returns?

TBGVX currently has the higher Sharpe Ratio (1.96 vs 1.24), 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.