FEDTX vs. COBYX

Last updated Aug 1, 2026

FEDTX (Fidelity Advisor Emerging Markets Discovery Fund Class M) and COBYX (The Cook & Bynum Fund) are both Emerging Markets Equities funds. Over the past 10 years, FEDTX returned 9.33%/yr vs 4.78%/yr for COBYX. Their 0.51 correlation means they have sometimes moved together and sometimes differently. FEDTX charges 1.76%/yr vs 1.49%/yr for COBYX.

Performance

FEDTX vs. COBYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Advisor Emerging Markets Discovery Fund Class M (FEDTX) 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, FEDTX achieves a 17.79% return, which is significantly higher than COBYX's 11.82% return. Over the past 10 years, FEDTX has outperformed COBYX with an annualized return of 9.33%, while COBYX has yielded a comparatively lower 4.78% annualized return.

FEDTX

• 1D: 2.75%
• 1M: -0.97%
• 6M: 8.45%
• YTD: 17.79%
• 1Y: 33.33%
• 3Y*: 14.85%
• 5Y*: 8.18%
• 10Y*: 9.33%
• ALL TIME*: 7.73%

COBYX

• 1D: 0.46%
• 1M: 0.41%
• 6M: 8.19%
• YTD: 11.82%
• 1Y: 20.62%
• 3Y*: 7.48%
• 5Y*: 9.02%
• 10Y*: 4.78%
• ALL TIME*: 4.78%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
COBYX The Cook & Bynum Fund	$0.00	$0.00	$0.00
FEDTX Fidelity Advisor Emerging Markets Discovery Fund Class M	$0.00	$0.00	$0.00

FEDTX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FEDTX Fidelity Advisor Emerging Markets Discovery Fund Class M	17.79%	31.19%	-4.16%	20.12%	-12.35%	6.05%	16.31%	18.91%	-19.40%	36.42%
COBYX The Cook & Bynum Fund	11.82%	20.50%	-10.32%	16.73%	9.28%	9.05%	-10.97%	9.40%	-13.40%	15.12%

Correlation

The correlation between FEDTX and COBYX is 0.32, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.32
Correlation (3Y) Balances recent behavior with more history.	0.41
Correlation (5Y) Shows whether the relationship held over a longer period.	0.50
Correlation (10Y) Provides a long-term view across more market conditions.	0.52
Correlation (All Time) Calculated using the full available price history since Jan 2, 2013	0.51

The correlation between FEDTX and COBYX shifts across timeframes, from 0.32 (1 year) to 0.52 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

FEDTX vs. COBYX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

FEDTX

FEDTX Risk / Return Rank: 84
FEDTX Sharpe Ratio Rank: 85
FEDTX Sortino Ratio Rank: 80
FEDTX Omega Ratio Rank: 81
FEDTX Calmar Ratio Rank: 89
FEDTX Martin Ratio Rank: 86

COBYX

COBYX Risk / Return Rank: 66
COBYX Sharpe Ratio Rank: 71
COBYX Sortino Ratio Rank: 71
COBYX Omega Ratio Rank: 68
COBYX Calmar Ratio Rank: 66
COBYX Martin Ratio Rank: 55

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

FEDTX vs. COBYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Advisor Emerging Markets Discovery Fund Class M (FEDTX) 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	FEDTX	COBYX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	1.64	+0.46
Sortino ratio: Return per unit of downside risk	2.80	2.39	+0.42
Omega ratio: Gain probability vs. loss probability	1.38	1.30	+0.08
Calmar ratio: Return relative to maximum drawdown	3.28	2.17	+1.12
Martin ratio: Return relative to average drawdown	11.13	7.33	+3.80

FEDTX vs. COBYX - Sharpe Ratio Comparison

The current FEDTX Sharpe Ratio is 2.10, which is comparable to the COBYX Sharpe Ratio of 1.64. The chart below compares the historical Sharpe Ratios of FEDTX 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.

Drawdowns

FEDTX vs. COBYX - Drawdown Comparison

The maximum FEDTX drawdown since its inception was -43.70%, which is greater than COBYX's maximum drawdown of -34.18%. Use the drawdown chart below to compare losses from any high point for FEDTX and COBYX.

Drawdown Indicators

	FEDTX	COBYX	Difference
Max Drawdown Largest peak-to-trough decline	-43.70%	-34.18%	-9.52%
Max Drawdown (1Y) Largest decline over 1 year	-9.62%	-8.95%	-0.67%
Max Drawdown (3Y) Largest decline over 3 years	-17.51%	-16.29%	-1.22%
Max Drawdown (5Y) Largest decline over 5 years	-27.91%	-17.10%	-10.81%
Max Drawdown (10Y) Largest decline over 10 years	-43.70%	-34.18%	-9.52%
Current Drawdown Current decline from peak	-3.48%	-0.15%	-3.33%
Average Drawdown Average peak-to-trough decline	-9.10%	-6.74%	-2.36%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.84%	2.68%	+0.16%

Volatility

FEDTX vs. COBYX - Volatility Comparison

Fidelity Advisor Emerging Markets Discovery Fund Class M (FEDTX) has a higher volatility of 5.56% compared to The Cook & Bynum Fund (COBYX) at 3.16%. This indicates that FEDTX'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

	FEDTX	COBYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.56%	3.16%	+2.40%
Volatility (6M) Calculated over the trailing 6-month period	13.11%	9.77%	+3.34%
Volatility (1Y) Calculated over the trailing 1-year period	15.06%	11.82%	+3.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.41%	13.96%	+0.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.81%	13.67%	+2.14%

FEDTX vs. COBYX - Expense Ratio Comparison

FEDTX has a 1.76% expense ratio, which is higher than COBYX's 1.49% expense ratio.

Dividends

FEDTX vs. COBYX - Dividend Comparison

FEDTX's dividend yield for the trailing twelve months is around 3.66%, more than COBYX's 1.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COBYX The Cook & Bynum Fund	1.05%	1.18%	0.00%	1.01%	1.16%	2.18%	0.32%	0.69%	12.60%	1.88%	5.09%	0.00%
FEDTX Fidelity Advisor Emerging Markets Discovery Fund Class M	3.66%	4.31%	3.30%	1.63%	1.10%	11.36%	0.05%	0.48%	0.87%	1.51%	0.95%	0.22%

Frequently Asked Questions

Can I hold both FEDTX and COBYX in my portfolio?

FEDTX and COBYX have a correlation of 0.32, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FEDTX or COBYX?

FEDTX has higher volatility (5.56%) compared to COBYX (3.16%). In terms of maximum drawdown, FEDTX dropped -43.70% vs COBYX's -34.18%.

Which has better risk-adjusted returns?

FEDTX currently has the higher Sharpe Ratio (2.10 vs 1.64), 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.