CNJFX vs. PRJPX

Last updated Jun 4, 2026

CNJFX (Commonwealth Japan Fund) and PRJPX (T. Rowe Price Japan Fund) are both Japan Equities funds. Over the past 10 years, CNJFX returned 4.95%/yr vs 7.82%/yr for PRJPX. A 0.80 correlation means they provide meaningful diversification when combined. CNJFX charges 1.75%/yr vs 1.05%/yr for PRJPX.

Performance

CNJFX vs. PRJPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Commonwealth Japan Fund (CNJFX) and T. Rowe Price Japan Fund (PRJPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CNJFX achieves a 18.76% return, which is significantly higher than PRJPX's 11.22% return. Over the past 10 years, CNJFX has underperformed PRJPX with an annualized return of 4.95%, while PRJPX has yielded a comparatively higher 7.82% annualized return.

CNJFX

• 1D: -1.14%
• 1M: 6.79%
• YTD: 18.76%
• 6M: 21.04%
• 1Y: 31.33%
• 3Y*: 13.26%
• 5Y*: 4.41%
• 10Y*: 4.95%

PRJPX

• 1D: -0.26%
• 1M: 6.58%
• YTD: 11.22%
• 6M: 14.06%
• 1Y: 27.33%
• 3Y*: 14.69%
• 5Y*: 2.08%
• 10Y*: 7.82%

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

CNJFX vs. PRJPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CNJFX Commonwealth Japan Fund	18.76%	18.27%	-1.53%	14.15%	-18.49%	-7.92%	9.93%	19.15%	-10.80%	20.61%
PRJPX T. Rowe Price Japan Fund	11.22%	32.21%	6.13%	2.02%	-27.37%	-11.03%	34.60%	27.56%	-12.24%	32.06%

Correlation

The correlation between CNJFX and PRJPX is 0.78, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (5Y) Calculated over the trailing 5-year period	0.81
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Jun 12, 1996	0.80

The correlation between CNJFX and PRJPX has been stable across timeframes, ranging from 0.77 to 0.81 - a consistent structural relationship.

Return for Risk

CNJFX vs. PRJPX — Risk / Return Rank

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

CNJFX

CNJFX Risk / Return Rank: 38
CNJFX Sharpe Ratio Rank: 35
CNJFX Sortino Ratio Rank: 35
CNJFX Omega Ratio Rank: 33
CNJFX Calmar Ratio Rank: 48
CNJFX Martin Ratio Rank: 41

PRJPX

PRJPX Risk / Return Rank: 24
PRJPX Sharpe Ratio Rank: 24
PRJPX Sortino Ratio Rank: 25
PRJPX Omega Ratio Rank: 26
PRJPX Calmar Ratio Rank: 22
PRJPX Martin Ratio Rank: 22

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.

CNJFX vs. PRJPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Commonwealth Japan Fund (CNJFX) and T. Rowe Price Japan Fund (PRJPX). 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.

	CNJFX	PRJPX	Difference
Sharpe ratio: Return per unit of total volatility	1.71	1.41	+0.30
Sortino ratio: Return per unit of downside risk	2.46	2.06	+0.40
Omega ratio: Gain probability vs. loss probability	1.30	1.27	+0.04
Calmar ratio: Return relative to maximum drawdown	2.64	1.75	+0.89
Martin ratio: Return relative to average drawdown	8.80	5.59	+3.20
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CNJFX vs. PRJPX - Sharpe Ratio Comparison

The current CNJFX Sharpe Ratio is 1.71, which is comparable to the PRJPX Sharpe Ratio of 1.41. The chart below compares the historical Sharpe Ratios of CNJFX and PRJPX, 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

	CNJFX	PRJPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.71	1.41	+0.30
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.25	0.11	+0.14
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.29	0.45	-0.16
Sharpe Ratio (All Time) Calculated using the full available price history	-0.05	0.17	-0.23

Drawdowns

CNJFX vs. PRJPX - Drawdown Comparison

The maximum CNJFX drawdown since its inception was -73.98%, which is greater than PRJPX's maximum drawdown of -68.26%. Use the drawdown chart below to compare losses from any high point for CNJFX and PRJPX.

Drawdown Indicators

	CNJFX	PRJPX	Difference
Max Drawdown Largest peak-to-trough decline	-73.98%	-68.26%	-5.72%
Max Drawdown (1Y) Largest decline over 1 year	-11.44%	-15.11%	+3.67%
Max Drawdown (3Y) Largest decline over 3 years	-17.82%	-17.76%	-0.06%
Max Drawdown (5Y) Largest decline over 5 years	-36.47%	-44.42%	+7.95%
Max Drawdown (10Y) Largest decline over 10 years	-36.47%	-45.44%	+8.97%
Current Drawdown Current decline from peak	-30.08%	-3.09%	-26.99%
Average Drawdown Average peak-to-trough decline	-49.91%	-26.75%	-23.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.42%	4.72%	-1.30%

Volatility

CNJFX vs. PRJPX - Volatility Comparison

Commonwealth Japan Fund (CNJFX) has a higher volatility of 3.87% compared to T. Rowe Price Japan Fund (PRJPX) at 3.47%. This indicates that CNJFX's price experiences larger fluctuations and is considered to be riskier than PRJPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CNJFX	PRJPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.87%	3.47%	+0.40%
Volatility (6M) Calculated over the trailing 6-month period	13.55%	14.42%	-0.87%
Volatility (1Y) Calculated over the trailing 1-year period	17.69%	18.84%	-1.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.04%	19.05%	-1.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.28%	17.56%	-0.28%

CNJFX vs. PRJPX - Expense Ratio Comparison

CNJFX has a 1.75% expense ratio, which is higher than PRJPX's 1.05% expense ratio.

Dividends

CNJFX vs. PRJPX - Dividend Comparison

CNJFX's dividend yield for the trailing twelve months is around 1.01%, less than PRJPX's 13.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CNJFX Commonwealth Japan Fund	1.01%	1.20%	0.58%	0.10%	0.00%	4.25%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
PRJPX T. Rowe Price Japan Fund	13.17%	14.65%	4.82%	1.71%	6.94%	5.42%	2.59%	2.62%	7.56%	0.33%	0.70%	1.05%

Frequently Asked Questions

Can I hold both CNJFX and PRJPX in my portfolio?

CNJFX and PRJPX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CNJFX or PRJPX?

CNJFX has higher volatility (3.87%) compared to PRJPX (3.47%). In terms of maximum drawdown, CNJFX dropped -73.98% vs PRJPX's -68.26%.

Which has better risk-adjusted returns?

CNJFX currently has the higher Sharpe Ratio (1.71 vs 1.41), 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.