RNWGX vs. MDIZX

Last updated Jun 26, 2026

RNWGX (American Funds New World Fund® Class R-6) and MDIZX (MFS International Diversification Fund R6) are both mutual funds - RNWGX is a Emerging Markets Diversified fund managed by American Funds, while MDIZX is a Foreign Large Cap Equities fund tracking the MSCI All Country World (ex-US) Index (net div). Over the past 5 years, RNWGX returned 6.35%/yr vs 6.82%/yr for MDIZX. Their correlation of 0.90 suggests significant overlap in exposure. RNWGX charges 0.57%/yr vs 0.73%/yr for MDIZX.

Performance

RNWGX vs. MDIZX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds New World Fund® Class R-6 (RNWGX) and MFS International Diversification Fund R6 (MDIZX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RNWGX achieves a 14.65% return, which is significantly higher than MDIZX's 7.70% return.

RNWGX

• 1D: -0.51%
• 1M: 0.30%
• YTD: 14.65%
• 6M: 14.70%
• 1Y: 29.49%
• 3Y*: 18.52%
• 5Y*: 6.35%
• 10Y*: 11.53%

MDIZX

• 1D: 0.20%
• 1M: -1.38%
• YTD: 7.70%
• 6M: 7.55%
• 1Y: 18.95%
• 3Y*: 15.56%
• 5Y*: 6.82%
• 10Y*: —

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

RNWGX vs. MDIZX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RNWGX American Funds New World Fund® Class R-6	14.65%	28.67%	6.88%	16.26%	-21.77%	5.09%	25.30%	28.03%	-12.00%	3.01%
MDIZX MFS International Diversification Fund R6	7.70%	27.99%	6.52%	14.48%	-17.04%	7.79%	15.45%	26.09%	-10.93%	3.71%

Correlation

The correlation between RNWGX and MDIZX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.90
Correlation (All Time) Calculated using the full available price history since Oct 19, 2017	0.90

The correlation between RNWGX and MDIZX has been stable across timeframes, ranging from 0.84 to 0.90 - a consistent structural relationship.

Return for Risk

RNWGX vs. MDIZX — Risk / Return Rank

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

RNWGX

RNWGX Risk / Return Rank: 52
RNWGX Sharpe Ratio Rank: 54
RNWGX Sortino Ratio Rank: 50
RNWGX Omega Ratio Rank: 60
RNWGX Calmar Ratio Rank: 46
RNWGX Martin Ratio Rank: 51

MDIZX

MDIZX Risk / Return Rank: 33
MDIZX Sharpe Ratio Rank: 35
MDIZX Sortino Ratio Rank: 34
MDIZX Omega Ratio Rank: 37
MDIZX Calmar Ratio Rank: 28
MDIZX Martin Ratio Rank: 32

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.

RNWGX vs. MDIZX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds New World Fund® Class R-6 (RNWGX) and MFS International Diversification Fund R6 (MDIZX). 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.

	RNWGX	MDIZX	Difference
Sharpe ratio: Return per unit of total volatility	1.81	1.43	+0.38
Sortino ratio: Return per unit of downside risk	2.48	2.01	+0.47
Omega ratio: Gain probability vs. loss probability	1.35	1.27	+0.08
Calmar ratio: Return relative to maximum drawdown	2.29	1.67	+0.62
Martin ratio: Return relative to average drawdown	9.11	6.26	+2.85

RNWGX vs. MDIZX - Sharpe Ratio Comparison

The current RNWGX Sharpe Ratio is 1.81, which is comparable to the MDIZX Sharpe Ratio of 1.43. The chart below compares the historical Sharpe Ratios of RNWGX and MDIZX, 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

RNWGX vs. MDIZX - Drawdown Comparison

The maximum RNWGX drawdown since its inception was -33.40%, which is greater than MDIZX's maximum drawdown of -30.09%. Use the drawdown chart below to compare losses from any high point for RNWGX and MDIZX.

Drawdown Indicators

	RNWGX	MDIZX	Difference
Max Drawdown Largest peak-to-trough decline	-33.40%	-30.09%	-3.31%
Max Drawdown (1Y) Largest decline over 1 year	-13.00%	-11.36%	-1.64%
Max Drawdown (3Y) Largest decline over 3 years	-15.00%	-12.59%	-2.41%
Max Drawdown (5Y) Largest decline over 5 years	-33.40%	-30.09%	-3.31%
Max Drawdown (10Y) Largest decline over 10 years	-33.40%	—	—
Current Drawdown Current decline from peak	-3.51%	-2.35%	-1.16%
Average Drawdown Average peak-to-trough decline	-8.04%	-6.66%	-1.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.26%	3.02%	+0.24%

Volatility

RNWGX vs. MDIZX - Volatility Comparison

American Funds New World Fund® Class R-6 (RNWGX) has a higher volatility of 8.25% compared to MFS International Diversification Fund R6 (MDIZX) at 5.43%. This indicates that RNWGX's price experiences larger fluctuations and is considered to be riskier than MDIZX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RNWGX	MDIZX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.25%	5.43%	+2.82%
Volatility (6M) Calculated over the trailing 6-month period	14.60%	11.26%	+3.34%
Volatility (1Y) Calculated over the trailing 1-year period	16.50%	13.30%	+3.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.78%	14.38%	+1.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.22%	15.24%	+0.98%

RNWGX vs. MDIZX - Expense Ratio Comparison

RNWGX has a 0.57% expense ratio, which is lower than MDIZX's 0.73% expense ratio.

Dividends

RNWGX vs. MDIZX - Dividend Comparison

RNWGX's dividend yield for the trailing twelve months is around 5.31%, more than MDIZX's 4.88% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MDIZX MFS International Diversification Fund R6	4.88%	5.26%	3.61%	4.24%	2.76%	2.79%	1.72%	2.57%	3.23%	1.66%	0.00%	0.00%
RNWGX American Funds New World Fund® Class R-6	5.31%	6.09%	4.11%	2.88%	1.33%	7.32%	0.44%	4.05%	2.71%	2.26%	1.37%	1.04%

Frequently Asked Questions

Can I hold both RNWGX and MDIZX in my portfolio?

RNWGX and MDIZX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RNWGX or MDIZX?

RNWGX has higher volatility (8.25%) compared to MDIZX (5.43%). In terms of maximum drawdown, RNWGX dropped -33.40% vs MDIZX's -30.09%.

Which has better risk-adjusted returns?

RNWGX currently has the higher Sharpe Ratio (1.81 vs 1.43), 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.