BCEMX vs. COBYX

Last updated Apr 4, 2026

Compare and contrast key facts about Boston Common ESG Impact Emerging Markets Fund (BCEMX) and The Cook & Bynum Fund (COBYX).

BCEMX is managed by Boston Common. It was launched on Sep 19, 2021. COBYX is managed by Cook & Bynum. It was launched on Jun 30, 2009.

Performance

BCEMX vs. COBYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Boston Common ESG Impact Emerging Markets Fund (BCEMX) and The Cook & Bynum Fund (COBYX). The values are adjusted to include any dividend payments, if applicable.

BCEMX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
BCEMX Boston Common ESG Impact Emerging Markets Fund	3.22%	37.06%	8.63%	6.39%	-17.32%	1.08%
COBYX The Cook & Bynum Fund	3.98%	20.50%	-10.32%	16.73%	9.28%	3.13%

Returns By Period

In the year-to-date period, BCEMX achieves a 3.22% return, which is significantly lower than COBYX's 3.98% return.

BCEMX

• 1D: -0.94%
• 1M: -3.61%
• YTD: 3.22%
• 6M: 7.27%
• 1Y: 39.89%
• 3Y*: 16.27%
• 5Y*: —
• 10Y*: —

COBYX

• 1D: 0.00%
• 1M: -2.09%
• YTD: 3.98%
• 6M: 8.99%
• 1Y: 8.48%
• 3Y*: 7.61%
• 5Y*: 7.92%
• 10Y*: 4.06%

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

BCEMX vs. COBYX - Expense Ratio Comparison

BCEMX has a 0.99% expense ratio, which is lower than COBYX's 1.49% expense ratio.

COBYX

The Cook & Bynum Fund

BCEMX

Boston Common ESG Impact Emerging Markets Fund

Return for Risk

BCEMX vs. COBYX — Risk / Return Rank

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

BCEMX

BCEMX Risk / Return Rank: 88
BCEMX Sharpe Ratio Rank: 90
BCEMX Sortino Ratio Rank: 87
BCEMX Omega Ratio Rank: 86
BCEMX Calmar Ratio Rank: 88
BCEMX Martin Ratio Rank: 88

COBYX

COBYX Risk / Return Rank: 22
COBYX Sharpe Ratio Rank: 17
COBYX Sortino Ratio Rank: 16
COBYX Omega Ratio Rank: 17
COBYX Calmar Ratio Rank: 34
COBYX 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.

BCEMX vs. COBYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Boston Common ESG Impact Emerging Markets Fund (BCEMX) and The Cook & Bynum Fund (COBYX). 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.

	BCEMX	COBYX	Difference
Sharpe ratio Return per unit of total volatility	1.98	0.61	+1.37
Sortino ratio Return per unit of downside risk	2.59	0.91	+1.68
Omega ratio Gain probability vs. loss probability	1.38	1.13	+0.25
Calmar ratio Return relative to maximum drawdown	2.70	1.25	+1.45
Martin ratio Return relative to average drawdown	10.45	3.71	+6.74
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BCEMX vs. COBYX - Sharpe Ratio Comparison

The current BCEMX Sharpe Ratio is 1.98, which is higher than the COBYX Sharpe Ratio of 0.61. The chart below compares the historical Sharpe Ratios of BCEMX and COBYX, 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

	BCEMX	COBYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.98	0.61	+1.37
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.58	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.30	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.42	0.35	+0.06

Correlation

The correlation between BCEMX and COBYX is 0.47, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

BCEMX vs. COBYX - Dividend Comparison

BCEMX's dividend yield for the trailing twelve months is around 2.11%, more than COBYX's 1.13% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
BCEMX Boston Common ESG Impact Emerging Markets Fund	2.11%	2.18%	2.33%	2.15%	2.02%	0.46%	0.00%	0.00%	0.00%	0.00%	0.00%
COBYX The Cook & Bynum Fund	1.13%	1.18%	0.00%	1.01%	1.16%	2.18%	0.32%	0.69%	12.60%	1.88%	5.09%

Drawdowns

BCEMX vs. COBYX - Drawdown Comparison

The maximum BCEMX drawdown since its inception was -31.06%, smaller than the maximum COBYX drawdown of -34.18%. Use the drawdown chart below to compare losses from any high point for BCEMX and COBYX.

Drawdown Indicators

	BCEMX	COBYX	Difference
Max Drawdown Largest peak-to-trough decline	-31.06%	-34.18%	+3.12%
Max Drawdown (1Y) Largest decline over 1 year	-13.85%	-8.95%	-4.90%
Max Drawdown (5Y) Largest decline over 5 years	—	-17.10%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-34.18%	—
Current Drawdown Current decline from peak	-10.75%	-5.33%	-5.42%
Average Drawdown Average peak-to-trough decline	-11.70%	-6.86%	-4.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.58%	3.02%	+0.56%

Volatility

BCEMX vs. COBYX - Volatility Comparison

Boston Common ESG Impact Emerging Markets Fund (BCEMX) has a higher volatility of 8.15% compared to The Cook & Bynum Fund (COBYX) at 4.56%. This indicates that BCEMX's price experiences larger fluctuations and is considered to be riskier than COBYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BCEMX	COBYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.15%	4.56%	+3.59%
Volatility (6M) Calculated over the trailing 6-month period	14.03%	8.46%	+5.57%
Volatility (1Y) Calculated over the trailing 1-year period	18.69%	14.45%	+4.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.14%	13.97%	+4.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.14%	13.55%	+4.59%