EFEIX vs. COBYX

Last updated Jun 4, 2026

EFEIX (Ashmore Emerging Markets Frontier Equity Fund) and COBYX (The Cook & Bynum Fund) are both Emerging Markets Diversified funds. Over the past 10 years, EFEIX returned 7.16%/yr vs 4.79%/yr for COBYX. At a 0.36 correlation, their price movements are largely independent. EFEIX charges 1.52%/yr vs 1.49%/yr for COBYX.

Performance

EFEIX vs. COBYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Ashmore Emerging Markets Frontier Equity Fund (EFEIX) 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, EFEIX achieves a 2.96% return, which is significantly lower than COBYX's 10.74% return. Over the past 10 years, EFEIX has outperformed COBYX with an annualized return of 7.16%, while COBYX has yielded a comparatively lower 4.79% annualized return.

EFEIX

• 1D: 0.14%
• 1M: 1.46%
• YTD: 2.96%
• 6M: 6.03%
• 1Y: 16.27%
• 3Y*: 18.22%
• 5Y*: 9.09%
• 10Y*: 7.16%

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)

EFEIX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
EFEIX Ashmore Emerging Markets Frontier Equity Fund	2.96%	20.69%	24.12%	10.60%	-15.91%	24.18%	-4.12%	14.07%	-18.04%	19.28%
COBYX The Cook & Bynum Fund	10.74%	20.50%	-10.32%	16.73%	9.28%	9.05%	-10.97%	9.40%	-13.40%	15.12%

Correlation

The correlation between EFEIX and COBYX is 0.24, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.24
Correlation (3Y) Calculated over the trailing 3-year period	0.29
Correlation (5Y) Calculated over the trailing 5-year period	0.34
Correlation (10Y) Calculated over the trailing 10-year period	0.37
Correlation (All Time) Calculated using the full available price history since Nov 6, 2013	0.36

The correlation between EFEIX and COBYX shifts across timeframes, from 0.24 (1 year) to 0.37 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

EFEIX vs. COBYX — Risk / Return Rank

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

EFEIX

EFEIX Risk / Return Rank: 22
EFEIX Sharpe Ratio Rank: 24
EFEIX Sortino Ratio Rank: 25
EFEIX Omega Ratio Rank: 28
EFEIX Calmar Ratio Rank: 16
EFEIX Martin Ratio Rank: 15

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.

EFEIX vs. COBYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Ashmore Emerging Markets Frontier Equity Fund (EFEIX) 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.

	EFEIX	COBYX	Difference
Sharpe ratio: Return per unit of total volatility	1.41	1.23	+0.18
Sortino ratio: Return per unit of downside risk	2.10	1.86	+0.24
Omega ratio: Gain probability vs. loss probability	1.28	1.22	+0.05
Calmar ratio: Return relative to maximum drawdown	1.44	1.62	-0.18
Martin ratio: Return relative to average drawdown	4.33	5.15	-0.83
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

EFEIX vs. COBYX - Sharpe Ratio Comparison

The current EFEIX Sharpe Ratio is 1.41, which is comparable to the COBYX Sharpe Ratio of 1.23. The chart below compares the historical Sharpe Ratios of EFEIX 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

	EFEIX	COBYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.41	1.23	+0.18
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.92	0.59	+0.32
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.65	0.35	+0.30
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.39	+0.02

Drawdowns

EFEIX vs. COBYX - Drawdown Comparison

The maximum EFEIX drawdown since its inception was -40.50%, which is greater than COBYX's maximum drawdown of -34.18%. Use the drawdown chart below to compare losses from any high point for EFEIX and COBYX.

Drawdown Indicators

	EFEIX	COBYX	Difference
Max Drawdown Largest peak-to-trough decline	-40.50%	-34.18%	-6.32%
Max Drawdown (1Y) Largest decline over 1 year	-11.62%	-8.95%	-2.67%
Max Drawdown (3Y) Largest decline over 3 years	-11.62%	-16.29%	+4.67%
Max Drawdown (5Y) Largest decline over 5 years	-20.83%	-17.10%	-3.73%
Max Drawdown (10Y) Largest decline over 10 years	-40.50%	-34.18%	-6.32%
Current Drawdown Current decline from peak	-4.40%	-1.12%	-3.28%
Average Drawdown Average peak-to-trough decline	-12.28%	-6.80%	-5.48%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.87%	2.99%	+0.88%

Volatility

EFEIX vs. COBYX - Volatility Comparison

The current volatility for Ashmore Emerging Markets Frontier Equity Fund (EFEIX) is 3.11%, while The Cook & Bynum Fund (COBYX) has a volatility of 3.75%. This indicates that EFEIX experiences smaller price fluctuations and is considered to be less risky than COBYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	EFEIX	COBYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.11%	3.75%	-0.64%
Volatility (6M) Calculated over the trailing 6-month period	10.12%	9.46%	+0.66%
Volatility (1Y) Calculated over the trailing 1-year period	11.89%	11.78%	+0.11%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.97%	13.99%	-4.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.04%	13.64%	-2.60%

EFEIX vs. COBYX - Expense Ratio Comparison

EFEIX has a 1.52% expense ratio, which is higher than COBYX's 1.49% expense ratio.

Dividends

EFEIX vs. COBYX - Dividend Comparison

EFEIX's dividend yield for the trailing twelve months is around 11.06%, more than COBYX's 1.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
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%
EFEIX Ashmore Emerging Markets Frontier Equity Fund	11.06%	11.69%	2.15%	2.26%	0.17%	1.61%	0.96%	1.63%	1.44%	0.88%	0.38%

Frequently Asked Questions

Can I hold both EFEIX and COBYX in my portfolio?

EFEIX and COBYX have a correlation of 0.24, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, EFEIX or COBYX?

COBYX has higher volatility (3.75%) compared to EFEIX (3.11%). In terms of maximum drawdown, EFEIX dropped -40.50% vs COBYX's -34.18%.

Which has better risk-adjusted returns?

EFEIX currently has the higher Sharpe Ratio (1.41 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.