POGRX vs. AMFEX

Last updated Aug 1, 2026

POGRX (PRIMECAP Odyssey Growth Fund) and AMFEX (AAMA Equity Fund) are both Large Cap Blend Equities funds. Over the past 5 years, POGRX returned 14.97%/yr vs 10.69%/yr for AMFEX. Their correlation of 0.88 means they have usually moved in the same direction. POGRX charges 0.66%/yr vs 1.17%/yr for AMFEX.

Performance

POGRX vs. AMFEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PRIMECAP Odyssey Growth Fund (POGRX) and AAMA Equity Fund (AMFEX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, POGRX achieves a 22.85% return, which is significantly higher than AMFEX's 13.57% return.

POGRX

• 1D: 3.85%
• 1M: -4.02%
• 6M: 16.81%
• YTD: 22.85%
• 1Y: 52.22%
• 3Y*: 25.37%
• 5Y*: 14.97%
• 10Y*: 16.41%
• ALL TIME*: 12.96%

AMFEX

• 1D: 0.80%
• 1M: 0.71%
• 6M: 8.82%
• YTD: 13.57%
• 1Y: 24.69%
• 3Y*: 16.86%
• 5Y*: 10.69%
• 10Y*: —
• ALL TIME*: 12.18%

*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)
AMFEX AAMA Equity Fund	$0.00	$0.00	$0.00
POGRX PRIMECAP Odyssey Growth Fund	$0.00	$0.00	$0.00

POGRX vs. AMFEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
POGRX PRIMECAP Odyssey Growth Fund	22.85%	32.99%	13.09%	23.85%	-14.61%	18.81%	17.05%	23.98%	-9.63%
AMFEX AAMA Equity Fund	13.57%	17.33%	16.28%	17.32%	-14.08%	22.58%	12.70%	24.62%	-9.60%

Correlation

The correlation between POGRX and AMFEX is 0.71, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.71
Correlation (3Y) Balances recent behavior with more history.	0.80
Correlation (5Y) Shows whether the relationship held over a longer period.	0.86
Correlation (All Time) Calculated using the full available price history since Nov 7, 2018	0.88

The correlation between POGRX and AMFEX shifts across timeframes, from 0.71 (1 year) to 0.88 (all time), reflecting how their relationship changes across market environments.

Return for Risk

POGRX vs. AMFEX — Risk / Return Rank

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

POGRX

POGRX Risk / Return Rank: 89
POGRX Sharpe Ratio Rank: 91
POGRX Sortino Ratio Rank: 87
POGRX Omega Ratio Rank: 84
POGRX Calmar Ratio Rank: 91
POGRX Martin Ratio Rank: 91

AMFEX

AMFEX Risk / Return Rank: 89
AMFEX Sharpe Ratio Rank: 89
AMFEX Sortino Ratio Rank: 85
AMFEX Omega Ratio Rank: 83
AMFEX Calmar Ratio Rank: 92
AMFEX Martin Ratio Rank: 95

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.

POGRX vs. AMFEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PRIMECAP Odyssey Growth Fund (POGRX) and AAMA Equity Fund (AMFEX). 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.

	POGRX	AMFEX	Difference
Sharpe ratio: Return per unit of total volatility	2.30	2.22	+0.08
Sortino ratio: Return per unit of downside risk	3.13	3.03	+0.10
Omega ratio: Gain probability vs. loss probability	1.40	1.39	+0.01
Calmar ratio: Return relative to maximum drawdown	3.40	3.69	-0.29
Martin ratio: Return relative to average drawdown	12.40	15.37	-2.96

POGRX vs. AMFEX - Sharpe Ratio Comparison

The current POGRX Sharpe Ratio is 2.30, which is comparable to the AMFEX Sharpe Ratio of 2.22. The chart below compares the historical Sharpe Ratios of POGRX and AMFEX, 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

POGRX vs. AMFEX - Drawdown Comparison

The maximum POGRX drawdown since its inception was -51.63%, which is greater than AMFEX's maximum drawdown of -30.41%. Use the drawdown chart below to compare losses from any high point for POGRX and AMFEX.

Drawdown Indicators

	POGRX	AMFEX	Difference
Max Drawdown Largest peak-to-trough decline	-51.63%	-30.41%	-21.22%
Max Drawdown (1Y) Largest decline over 1 year	-14.40%	-6.07%	-8.33%
Max Drawdown (3Y) Largest decline over 3 years	-22.13%	-15.23%	-6.90%
Max Drawdown (5Y) Largest decline over 5 years	-26.85%	-21.21%	-5.64%
Max Drawdown (10Y) Largest decline over 10 years	-35.29%	—	—
Current Drawdown Current decline from peak	-8.22%	-0.42%	-7.80%
Average Drawdown Average peak-to-trough decline	-7.11%	-4.24%	-2.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.95%	1.46%	+2.49%

Volatility

POGRX vs. AMFEX - Volatility Comparison

PRIMECAP Odyssey Growth Fund (POGRX) has a higher volatility of 7.59% compared to AAMA Equity Fund (AMFEX) at 2.37%. This indicates that POGRX's price experiences larger fluctuations and is considered to be riskier than AMFEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	POGRX	AMFEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.59%	2.37%	+5.22%
Volatility (6M) Calculated over the trailing 6-month period	18.17%	7.74%	+10.43%
Volatility (1Y) Calculated over the trailing 1-year period	21.29%	10.10%	+11.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.21%	14.22%	+5.99%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.66%	16.84%	+3.82%

POGRX vs. AMFEX - Expense Ratio Comparison

POGRX has a 0.66% expense ratio, which is lower than AMFEX's 1.17% expense ratio.

Dividends

POGRX vs. AMFEX - Dividend Comparison

POGRX's dividend yield for the trailing twelve months is around 20.26%, more than AMFEX's 10.56% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMFEX AAMA Equity Fund	10.56%	11.99%	9.19%	0.92%	4.82%	0.22%	0.44%	0.78%	0.83%	0.00%	0.00%	0.00%
POGRX PRIMECAP Odyssey Growth Fund	20.26%	24.89%	20.79%	13.28%	12.36%	13.68%	12.50%	5.13%	2.45%	1.54%	5.83%	1.29%

Frequently Asked Questions

Can I hold both POGRX and AMFEX in my portfolio?

POGRX and AMFEX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, POGRX or AMFEX?

POGRX has higher volatility (7.59%) compared to AMFEX (2.37%). In terms of maximum drawdown, POGRX dropped -51.63% vs AMFEX's -30.41%.

Which has better risk-adjusted returns?

POGRX currently has the higher Sharpe Ratio (2.30 vs 2.22), 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.