CPGAX vs. PRAFX

Last updated Jun 4, 2026

CPGAX (American Funds Global Growth Portfolio) and PRAFX (T. Rowe Price Real Assets Fund) are both Global Equities funds. Over the past 10 years, CPGAX returned 12.51%/yr vs 9.05%/yr for PRAFX. A 0.75 correlation means they provide meaningful diversification when combined. CPGAX charges 0.40%/yr vs 0.92%/yr for PRAFX.

Performance

CPGAX vs. PRAFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds Global Growth Portfolio (CPGAX) and T. Rowe Price Real Assets Fund (PRAFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPGAX achieves a 13.11% return, which is significantly lower than PRAFX's 15.05% return. Over the past 10 years, CPGAX has outperformed PRAFX with an annualized return of 12.51%, while PRAFX has yielded a comparatively lower 9.05% annualized return.

CPGAX

• 1D: 0.34%
• 1M: 6.19%
• YTD: 13.11%
• 6M: 14.29%
• 1Y: 30.48%
• 3Y*: 20.82%
• 5Y*: 9.17%
• 10Y*: 12.51%

PRAFX

• 1D: 1.45%
• 1M: 1.70%
• YTD: 15.05%
• 6M: 17.16%
• 1Y: 38.09%
• 3Y*: 17.19%
• 5Y*: 8.26%
• 10Y*: 9.05%

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

CPGAX vs. PRAFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CPGAX American Funds Global Growth Portfolio	13.11%	22.99%	14.81%	24.05%	-25.77%	12.89%	27.36%	27.87%	-8.99%	28.56%
PRAFX T. Rowe Price Real Assets Fund	15.05%	29.51%	0.32%	6.65%	-10.24%	25.74%	7.02%	19.62%	-11.55%	10.48%

Correlation

The correlation between CPGAX and PRAFX is 0.58, 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	0.58
Correlation (3Y) Calculated over the trailing 3-year period	0.65
Correlation (5Y) Calculated over the trailing 5-year period	0.73
Correlation (10Y) Calculated over the trailing 10-year period	0.73
Correlation (All Time) Calculated using the full available price history since May 22, 2012	0.75

The correlation between CPGAX and PRAFX shifts across timeframes, from 0.58 (1 year) to 0.75 (all time), reflecting how their relationship changes across market environments.

Return for Risk

CPGAX vs. PRAFX — Risk / Return Rank

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

CPGAX

CPGAX Risk / Return Rank: 54
CPGAX Sharpe Ratio Rank: 54
CPGAX Sortino Ratio Rank: 51
CPGAX Omega Ratio Rank: 51
CPGAX Calmar Ratio Rank: 51
CPGAX Martin Ratio Rank: 61

PRAFX

PRAFX Risk / Return Rank: 57
PRAFX Sharpe Ratio Rank: 65
PRAFX Sortino Ratio Rank: 48
PRAFX Omega Ratio Rank: 58
PRAFX Calmar Ratio Rank: 59
PRAFX Martin Ratio Rank: 54

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.

CPGAX vs. PRAFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Global Growth Portfolio (CPGAX) and T. Rowe Price Real Assets Fund (PRAFX). 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.

	CPGAX	PRAFX	Difference
Sharpe ratio Return per unit of total volatility	2.17	2.37	-0.20
Sortino ratio Return per unit of downside risk	3.01	2.91	+0.10
Omega ratio Gain probability vs. loss probability	1.39	1.42	-0.03
Calmar ratio Return relative to maximum drawdown	2.73	2.96	-0.23
Martin ratio Return relative to average drawdown	12.10	10.93	+1.17
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CPGAX vs. PRAFX - Sharpe Ratio Comparison

The current CPGAX Sharpe Ratio is 2.17, which is comparable to the PRAFX Sharpe Ratio of 2.37. The chart below compares the historical Sharpe Ratios of CPGAX and PRAFX, 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

	CPGAX	PRAFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.17	2.37	-0.20
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.54	0.47	+0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.73	0.50	+0.23
Sharpe Ratio (All Time) Calculated using the full available price history	0.75	0.36	+0.38

Drawdowns

CPGAX vs. PRAFX - Drawdown Comparison

The maximum CPGAX drawdown since its inception was -34.42%, smaller than the maximum PRAFX drawdown of -38.05%. Use the drawdown chart below to compare losses from any high point for CPGAX and PRAFX.

Drawdown Indicators

	CPGAX	PRAFX	Difference
Max Drawdown Largest peak-to-trough decline	-34.42%	-38.05%	+3.63%
Max Drawdown (1Y) Largest decline over 1 year	-11.33%	-12.91%	+1.58%
Max Drawdown (3Y) Largest decline over 3 years	-17.99%	-16.86%	-1.13%
Max Drawdown (5Y) Largest decline over 5 years	-34.42%	-26.73%	-7.69%
Max Drawdown (10Y) Largest decline over 10 years	-34.42%	-38.05%	+3.63%
Current Drawdown Current decline from peak	0.00%	-3.83%	+3.83%
Average Drawdown Average peak-to-trough decline	-5.93%	-8.77%	+2.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.55%	3.48%	-0.93%

Volatility

CPGAX vs. PRAFX - Volatility Comparison

The current volatility for American Funds Global Growth Portfolio (CPGAX) is 4.43%, while T. Rowe Price Real Assets Fund (PRAFX) has a volatility of 4.87%. This indicates that CPGAX experiences smaller price fluctuations and is considered to be less risky than PRAFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPGAX	PRAFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.43%	4.87%	-0.44%
Volatility (6M) Calculated over the trailing 6-month period	11.59%	13.29%	-1.70%
Volatility (1Y) Calculated over the trailing 1-year period	14.26%	16.19%	-1.93%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.07%	17.70%	-0.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.29%	18.14%	-0.85%

CPGAX vs. PRAFX - Expense Ratio Comparison

CPGAX has a 0.40% expense ratio, which is lower than PRAFX's 0.92% expense ratio.

Dividends

CPGAX vs. PRAFX - Dividend Comparison

CPGAX's dividend yield for the trailing twelve months is around 4.94%, more than PRAFX's 2.56% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CPGAX American Funds Global Growth Portfolio	4.94%	5.59%	4.29%	0.92%	7.95%	3.33%	0.77%	4.89%	5.69%	6.21%	3.66%	3.92%
PRAFX T. Rowe Price Real Assets Fund	2.56%	2.94%	1.56%	1.52%	1.38%	1.83%	1.37%	2.64%	2.58%	1.45%	1.96%	1.88%

Frequently Asked Questions

Can I hold both CPGAX and PRAFX in my portfolio?

CPGAX and PRAFX have a correlation of 0.58, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPGAX or PRAFX?

PRAFX has higher volatility (4.87%) compared to CPGAX (4.43%). In terms of maximum drawdown, CPGAX dropped -34.42% vs PRAFX's -38.05%.

Which has better risk-adjusted returns?

PRAFX currently has the higher Sharpe Ratio (2.37 vs 2.17), 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.