CEFIX vs. COBYX

Last updated Apr 1, 2026

Compare and contrast key facts about Calvert Emerging Markets Advancement Fund (CEFIX) and The Cook & Bynum Fund (COBYX).

CEFIX is managed by Calvert Research and Management. It was launched on Sep 30, 2019. COBYX is managed by Cook & Bynum. It was launched on Jun 30, 2009.

Performance

CEFIX vs. COBYX - Performance Comparison

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

CEFIX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
CEFIX Calvert Emerging Markets Advancement Fund	-0.90%	38.50%	11.21%	11.61%	-15.07%	0.27%	15.35%	10.46%
COBYX The Cook & Bynum Fund	1.14%	20.50%	-10.32%	16.73%	9.28%	9.05%	-10.97%	0.26%

Returns By Period

In the year-to-date period, CEFIX achieves a -0.90% return, which is significantly lower than COBYX's 1.14% return.

CEFIX

• 1D: -0.90%
• 1M: -13.04%
• YTD: -0.90%
• 6M: 5.45%
• 1Y: 31.55%
• 3Y*: 18.20%
• 5Y*: 7.26%
• 10Y*: —

COBYX

• 1D: 0.85%
• 1M: -7.34%
• YTD: 1.14%
• 6M: 5.27%
• 1Y: 6.45%
• 3Y*: 6.41%
• 5Y*: 7.53%
• 10Y*: 3.74%

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

CEFIX vs. COBYX - Expense Ratio Comparison

CEFIX has a 0.97% expense ratio, which is lower than COBYX's 1.49% expense ratio.

COBYX

The Cook & Bynum Fund

CEFIX

Calvert Emerging Markets Advancement Fund

Return for Risk

CEFIX vs. COBYX — Risk / Return Rank

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

CEFIX

CEFIX Risk / Return Rank: 86
CEFIX Sharpe Ratio Rank: 89
CEFIX Sortino Ratio Rank: 86
CEFIX Omega Ratio Rank: 86
CEFIX Calmar Ratio Rank: 83
CEFIX Martin Ratio Rank: 84

COBYX

COBYX Risk / Return Rank: 18
COBYX Sharpe Ratio Rank: 13
COBYX Sortino Ratio Rank: 12
COBYX Omega Ratio Rank: 13
COBYX Calmar Ratio Rank: 29
COBYX Martin Ratio Rank: 23

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.

CEFIX vs. COBYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calvert Emerging Markets Advancement Fund (CEFIX) 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.

	CEFIX	COBYX	Difference
Sharpe ratio Return per unit of total volatility	1.83	0.34	+1.49
Sortino ratio Return per unit of downside risk	2.31	0.55	+1.76
Omega ratio Gain probability vs. loss probability	1.36	1.08	+0.28
Calmar ratio Return relative to maximum drawdown	2.04	0.83	+1.22
Martin ratio Return relative to average drawdown	8.52	2.50	+6.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CEFIX vs. COBYX - Sharpe Ratio Comparison

The current CEFIX Sharpe Ratio is 1.83, which is higher than the COBYX Sharpe Ratio of 0.34. The chart below compares the historical Sharpe Ratios of CEFIX and COBYX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	CEFIX	COBYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.83	0.34	+1.49
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	0.55	-0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.28	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	0.34	+0.25

Correlation

The correlation between CEFIX and COBYX is 0.51, 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

CEFIX vs. COBYX - Dividend Comparison

CEFIX's dividend yield for the trailing twelve months is around 3.16%, more than COBYX's 1.17% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
CEFIX Calvert Emerging Markets Advancement Fund	3.16%	3.13%	1.76%	3.20%	5.51%	4.57%	0.13%	0.48%	0.00%	0.00%	0.00%
COBYX The Cook & Bynum Fund	1.17%	1.18%	0.00%	1.01%	1.16%	2.18%	0.32%	0.69%	12.60%	1.88%	5.09%

Drawdowns

CEFIX vs. COBYX - Drawdown Comparison

The maximum CEFIX drawdown since its inception was -30.73%, smaller than the maximum COBYX drawdown of -34.18%. Use the drawdown chart below to compare losses from any high point for CEFIX and COBYX.

Drawdown Indicators

	CEFIX	COBYX	Difference
Max Drawdown Largest peak-to-trough decline	-30.73%	-34.18%	+3.45%
Max Drawdown (1Y) Largest decline over 1 year	-13.87%	-8.95%	-4.92%
Max Drawdown (5Y) Largest decline over 5 years	-24.41%	-17.10%	-7.31%
Max Drawdown (10Y) Largest decline over 10 years	—	-34.18%	—
Current Drawdown Current decline from peak	-13.87%	-7.92%	-5.95%
Average Drawdown Average peak-to-trough decline	-9.78%	-6.86%	-2.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.33%	2.96%	+0.37%

Volatility

CEFIX vs. COBYX - Volatility Comparison

Calvert Emerging Markets Advancement Fund (CEFIX) has a higher volatility of 8.61% compared to The Cook & Bynum Fund (COBYX) at 4.99%. This indicates that CEFIX'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

	CEFIX	COBYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.61%	4.99%	+3.62%
Volatility (6M) Calculated over the trailing 6-month period	12.54%	8.27%	+4.27%
Volatility (1Y) Calculated over the trailing 1-year period	16.61%	14.50%	+2.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.70%	13.96%	+0.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.11%	13.54%	+3.57%