PIEFX vs. COBYX

Last updated Jun 24, 2026

PIEFX (Federated Hermes Emerging Markets Equity Fund) and COBYX (The Cook & Bynum Fund) are both Emerging Markets Diversified funds. Over the past 5 years, PIEFX returned 7.34%/yr vs 8.01%/yr for COBYX. At a 0.44 correlation, their price movements are largely independent. PIEFX charges 0.98%/yr vs 1.49%/yr for COBYX.

Performance

PIEFX vs. COBYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Federated Hermes Emerging Markets Equity Fund (PIEFX) 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, PIEFX achieves a 42.08% return, which is significantly higher than COBYX's 8.92% return.

PIEFX

• 1D: 0.38%
• 1M: 9.76%
• YTD: 42.08%
• 6M: 43.50%
• 1Y: 68.99%
• 3Y*: 29.31%
• 5Y*: 7.34%
• 10Y*: —

COBYX

• 1D: -0.42%
• 1M: -2.39%
• YTD: 8.92%
• 6M: 8.18%
• 1Y: 14.37%
• 3Y*: 7.28%
• 5Y*: 8.01%
• 10Y*: 4.66%

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

PIEFX vs. COBYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PIEFX Federated Hermes Emerging Markets Equity Fund	42.08%	36.22%	11.90%	4.79%	-30.60%	0.31%	49.73%	23.04%	-22.17%	36.82%
COBYX The Cook & Bynum Fund	8.92%	20.50%	-10.32%	16.73%	9.28%	9.05%	-10.97%	9.40%	-13.40%	8.10%

Correlation

The correlation between PIEFX and COBYX is 0.22, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.22
Correlation (3Y) Calculated over the trailing 3-year period	0.35
Correlation (5Y) Calculated over the trailing 5-year period	0.41
Correlation (All Time) Calculated using the full available price history since Mar 31, 2017	0.44

Over the past year, the correlation between PIEFX and COBYX has dropped to 0.22 - well below their long-term average of 0.44, suggesting their price drivers have been diverging.

Return for Risk

PIEFX vs. COBYX — Risk / Return Rank

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

PIEFX

PIEFX Risk / Return Rank: 93
PIEFX Sharpe Ratio Rank: 98
PIEFX Sortino Ratio Rank: 91
PIEFX Omega Ratio Rank: 88
PIEFX Calmar Ratio Rank: 96
PIEFX Martin Ratio Rank: 94

COBYX

COBYX Risk / Return Rank: 24
COBYX Sharpe Ratio Rank: 23
COBYX Sortino Ratio Rank: 25
COBYX Omega Ratio Rank: 22
COBYX Calmar Ratio Rank: 24
COBYX Martin Ratio Rank: 24

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.

PIEFX vs. COBYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Federated Hermes Emerging Markets Equity Fund (PIEFX) 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.

	PIEFX	COBYX	Difference
Sharpe ratio: Return per unit of total volatility	3.46	1.27	+2.19
Sortino ratio: Return per unit of downside risk	4.12	1.90	+2.22
Omega ratio: Gain probability vs. loss probability	1.59	1.23	+0.36
Calmar ratio: Return relative to maximum drawdown	5.67	1.69	+3.98
Martin ratio: Return relative to average drawdown	19.07	5.43	+13.64

PIEFX vs. COBYX - Sharpe Ratio Comparison

The current PIEFX Sharpe Ratio is 3.46, which is higher than the COBYX Sharpe Ratio of 1.27. The chart below compares the historical Sharpe Ratios of PIEFX 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

PIEFX vs. COBYX - Drawdown Comparison

The maximum PIEFX drawdown since its inception was -48.43%, which is greater than COBYX's maximum drawdown of -34.18%. Use the drawdown chart below to compare losses from any high point for PIEFX and COBYX.

Drawdown Indicators

	PIEFX	COBYX	Difference
Max Drawdown Largest peak-to-trough decline	-48.43%	-34.18%	-14.25%
Max Drawdown (1Y) Largest decline over 1 year	-13.67%	-8.95%	-4.72%
Max Drawdown (3Y) Largest decline over 3 years	-17.32%	-16.29%	-1.03%
Max Drawdown (5Y) Largest decline over 5 years	-46.49%	-17.10%	-29.39%
Max Drawdown (10Y) Largest decline over 10 years	—	-34.18%	—
Current Drawdown Current decline from peak	0.00%	-2.74%	+2.74%
Average Drawdown Average peak-to-trough decline	-19.10%	-6.78%	-12.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.90%	2.79%	+1.11%

Volatility

PIEFX vs. COBYX - Volatility Comparison

Federated Hermes Emerging Markets Equity Fund (PIEFX) has a higher volatility of 10.56% compared to The Cook & Bynum Fund (COBYX) at 2.98%. This indicates that PIEFX'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

	PIEFX	COBYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.56%	2.98%	+7.58%
Volatility (6M) Calculated over the trailing 6-month period	19.16%	9.55%	+9.61%
Volatility (1Y) Calculated over the trailing 1-year period	22.42%	11.91%	+10.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.72%	13.99%	+5.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.14%	13.66%	+6.48%

PIEFX vs. COBYX - Expense Ratio Comparison

PIEFX has a 0.98% expense ratio, which is lower than COBYX's 1.49% expense ratio.

Dividends

PIEFX vs. COBYX - Dividend Comparison

PIEFX's dividend yield for the trailing twelve months is around 1.20%, more than COBYX's 1.08% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
COBYX The Cook & Bynum Fund	1.08%	1.18%	0.00%	1.01%	1.16%	2.18%	0.32%	0.69%	12.60%	1.88%	5.09%
PIEFX Federated Hermes Emerging Markets Equity Fund	1.20%	1.70%	1.12%	0.63%	0.99%	0.00%	0.00%	0.42%	2.01%	0.44%	0.00%

Frequently Asked Questions

Can I hold both PIEFX and COBYX in my portfolio?

PIEFX and COBYX have a correlation of 0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PIEFX or COBYX?

PIEFX has higher volatility (10.56%) compared to COBYX (2.98%). In terms of maximum drawdown, PIEFX dropped -48.43% vs COBYX's -34.18%.

Which has better risk-adjusted returns?

PIEFX currently has the higher Sharpe Ratio (3.46 vs 1.27), 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.