CEFIX vs. COBYX

Last updated Jun 4, 2026

CEFIX (Calvert Emerging Markets Advancement Fund) and COBYX (The Cook & Bynum Fund) are both Emerging Markets Diversified funds. Over the past 5 years, CEFIX returned 12.10%/yr vs 8.13%/yr for COBYX. A 0.50 correlation means they provide meaningful diversification when combined. CEFIX charges 0.97%/yr vs 1.49%/yr for COBYX.

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.

Returns By Period

In the year-to-date period, CEFIX achieves a 27.78% return, which is significantly higher than COBYX's 10.74% return.

CEFIX

• 1D: 0.25%
• 1M: 12.00%
• YTD: 27.78%
• 6M: 30.92%
• 1Y: 57.58%
• 3Y*: 27.81%
• 5Y*: 12.10%
• 10Y*: —

COBYX

• 1D: 0.67%
• 1M: 4.17%
• YTD: 10.74%
• 6M: 13.67%
• 1Y: 14.46%
• 3Y*: 8.98%
• 5Y*: 8.13%
• 10Y*: 4.79%

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

CEFIX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
CEFIX Calvert Emerging Markets Advancement Fund	27.78%	38.50%	11.21%	11.61%	-15.07%	0.27%	15.35%	10.46%
COBYX The Cook & Bynum Fund	10.74%	20.50%	-10.32%	16.73%	9.28%	9.05%	-10.97%	0.26%

Correlation

The correlation between CEFIX and COBYX is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.34
Correlation (3Y) Calculated over the trailing 3-year period	0.42
Correlation (5Y) Calculated over the trailing 5-year period	0.47
Correlation (All Time) Calculated using the full available price history since Oct 2, 2019	0.50

The correlation between CEFIX and COBYX shifts across timeframes, from 0.34 (1 year) to 0.50 (all time), reflecting how their relationship changes across market environments.

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: 89
CEFIX Sharpe Ratio Rank: 94
CEFIX Sortino Ratio Rank: 88
CEFIX Omega Ratio Rank: 89
CEFIX Calmar Ratio Rank: 86
CEFIX Martin Ratio Rank: 87

COBYX

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

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	3.26	1.23	+2.03
Sortino ratio: Return per unit of downside risk	4.19	1.86	+2.33
Omega ratio: Gain probability vs. loss probability	1.64	1.22	+0.41
Calmar ratio: Return relative to maximum drawdown	4.19	1.62	+2.57
Martin ratio: Return relative to average drawdown	16.86	5.15	+11.71
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 3.26, which is higher than the COBYX Sharpe Ratio of 1.23. The chart below compares the historical Sharpe Ratios of CEFIX 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

	CEFIX	COBYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.26	1.23	+2.03
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.79	0.59	+0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.35	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.80	0.39	+0.41

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 (3Y) Largest decline over 3 years	-13.87%	-16.29%	+2.42%
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	0.00%	-1.12%	+1.12%
Average Drawdown Average peak-to-trough decline	-9.59%	-6.80%	-2.79%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.44%	2.99%	+0.45%

Volatility

CEFIX vs. COBYX - Volatility Comparison

Calvert Emerging Markets Advancement Fund (CEFIX) has a higher volatility of 8.29% compared to The Cook & Bynum Fund (COBYX) at 3.75%. 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	8.29%	3.75%	+4.54%
Volatility (6M) Calculated over the trailing 6-month period	15.90%	9.46%	+6.44%
Volatility (1Y) Calculated over the trailing 1-year period	17.81%	11.78%	+6.03%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.38%	13.99%	+1.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.46%	13.64%	+3.82%

CEFIX vs. COBYX - Expense Ratio Comparison

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

Dividends

CEFIX vs. COBYX - Dividend Comparison

CEFIX's dividend yield for the trailing twelve months is around 2.45%, more than COBYX's 1.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
CEFIX Calvert Emerging Markets Advancement Fund	2.45%	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	1.06%	1.18%	0.00%	1.01%	1.16%	2.18%	0.32%	0.69%	12.60%	1.88%	5.09%

Frequently Asked Questions

Can I hold both CEFIX and COBYX in my portfolio?

CEFIX and COBYX have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CEFIX or COBYX?

CEFIX has higher volatility (8.29%) compared to COBYX (3.75%). In terms of maximum drawdown, CEFIX dropped -30.73% vs COBYX's -34.18%.

Which has better risk-adjusted returns?

CEFIX currently has the higher Sharpe Ratio (3.26 vs 1.23), 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.