YASLX vs. MWNIX

Last updated Jun 23, 2026

YASLX (AMG Yacktman Special Opportunities Fund) and MWNIX (MFS International New Discovery Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, YASLX returned 11.05%/yr vs 6.48%/yr for MWNIX. A 0.67 correlation means they provide meaningful diversification when combined. YASLX charges 1.86%/yr vs 1.03%/yr for MWNIX.

Performance

YASLX vs. MWNIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG Yacktman Special Opportunities Fund (YASLX) and MFS International New Discovery Fund (MWNIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, YASLX achieves a 14.01% return, which is significantly higher than MWNIX's 7.72% return. Over the past 10 years, YASLX has outperformed MWNIX with an annualized return of 11.05%, while MWNIX has yielded a comparatively lower 6.48% annualized return.

YASLX

• 1D: -0.64%
• 1M: -1.83%
• YTD: 14.01%
• 6M: 14.96%
• 1Y: 14.11%
• 3Y*: 10.69%
• 5Y*: 4.08%
• 10Y*: 11.05%

MWNIX

• 1D: 0.47%
• 1M: 1.48%
• YTD: 7.72%
• 6M: 7.82%
• 1Y: 12.59%
• 3Y*: 9.69%
• 5Y*: 3.31%
• 10Y*: 6.48%

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

YASLX vs. MWNIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
YASLX AMG Yacktman Special Opportunities Fund	14.01%	6.27%	11.23%	3.65%	-13.59%	24.45%	12.82%	17.07%	-10.15%	34.85%
MWNIX MFS International New Discovery Fund	7.72%	16.88%	0.90%	13.03%	-18.63%	5.06%	9.98%	22.85%	-10.41%	30.67%

Correlation

The correlation between YASLX and MWNIX is 0.55, 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	0.55
Correlation (3Y) Calculated over the trailing 3-year period	0.62
Correlation (5Y) Calculated over the trailing 5-year period	0.69
Correlation (10Y) Calculated over the trailing 10-year period	0.67
Correlation (All Time) Calculated using the full available price history since Jan 2, 2015	0.67

The correlation between YASLX and MWNIX shifts across timeframes, from 0.55 (1 year) to 0.69 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

YASLX vs. MWNIX — Risk / Return Rank

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

YASLX

YASLX Risk / Return Rank: 18
YASLX Sharpe Ratio Rank: 20
YASLX Sortino Ratio Rank: 18
YASLX Omega Ratio Rank: 21
YASLX Calmar Ratio Rank: 16
YASLX Martin Ratio Rank: 14

MWNIX

MWNIX Risk / Return Rank: 13
MWNIX Sharpe Ratio Rank: 14
MWNIX Sortino Ratio Rank: 14
MWNIX Omega Ratio Rank: 14
MWNIX Calmar Ratio Rank: 11
MWNIX Martin Ratio Rank: 13

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.

YASLX vs. MWNIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG Yacktman Special Opportunities Fund (YASLX) and MFS International New Discovery Fund (MWNIX). 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.

	YASLX	MWNIX	Difference
Sharpe ratio: Return per unit of total volatility	1.21	0.98	+0.23
Sortino ratio: Return per unit of downside risk	1.67	1.46	+0.21
Omega ratio: Gain probability vs. loss probability	1.22	1.19	+0.04
Calmar ratio: Return relative to maximum drawdown	1.32	0.99	+0.33
Martin ratio: Return relative to average drawdown	3.77	3.36	+0.41

YASLX vs. MWNIX - Sharpe Ratio Comparison

The current YASLX Sharpe Ratio is 1.21, which is comparable to the MWNIX Sharpe Ratio of 0.98. The chart below compares the historical Sharpe Ratios of YASLX and MWNIX, 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

YASLX vs. MWNIX - Drawdown Comparison

The maximum YASLX drawdown since its inception was -38.91%, smaller than the maximum MWNIX drawdown of -58.38%. Use the drawdown chart below to compare losses from any high point for YASLX and MWNIX.

Drawdown Indicators

	YASLX	MWNIX	Difference
Max Drawdown Largest peak-to-trough decline	-38.91%	-58.38%	+19.47%
Max Drawdown (1Y) Largest decline over 1 year	-10.18%	-11.78%	+1.60%
Max Drawdown (3Y) Largest decline over 3 years	-16.65%	-15.12%	-1.53%
Max Drawdown (5Y) Largest decline over 5 years	-27.74%	-33.67%	+5.93%
Max Drawdown (10Y) Largest decline over 10 years	-38.91%	-34.72%	-4.19%
Current Drawdown Current decline from peak	-3.21%	-0.90%	-2.31%
Average Drawdown Average peak-to-trough decline	-8.19%	-9.56%	+1.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.55%	3.47%	+0.08%

Volatility

YASLX vs. MWNIX - Volatility Comparison

The current volatility for AMG Yacktman Special Opportunities Fund (YASLX) is 3.17%, while MFS International New Discovery Fund (MWNIX) has a volatility of 4.15%. This indicates that YASLX experiences smaller price fluctuations and is considered to be less risky than MWNIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	YASLX	MWNIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.17%	4.15%	-0.98%
Volatility (6M) Calculated over the trailing 6-month period	8.75%	10.06%	-1.31%
Volatility (1Y) Calculated over the trailing 1-year period	11.18%	11.93%	-0.75%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.33%	13.26%	+3.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.03%	13.99%	+1.04%

YASLX vs. MWNIX - Expense Ratio Comparison

YASLX has a 1.86% expense ratio, which is higher than MWNIX's 1.03% expense ratio.

Dividends

YASLX vs. MWNIX - Dividend Comparison

YASLX has not paid dividends to shareholders, while MWNIX's dividend yield for the trailing twelve months is around 3.01%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MWNIX MFS International New Discovery Fund	3.01%	3.24%	7.61%	4.05%	5.68%	5.06%	3.90%	2.67%	6.68%	1.63%	1.09%	1.12%
YASLX AMG Yacktman Special Opportunities Fund	0.00%	0.00%	15.82%	8.97%	0.94%	3.85%	2.62%	12.95%	9.89%	4.86%	3.28%	4.59%

Frequently Asked Questions

Can I hold both YASLX and MWNIX in my portfolio?

YASLX and MWNIX have a correlation of 0.55, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, YASLX or MWNIX?

MWNIX has higher volatility (4.15%) compared to YASLX (3.17%). In terms of maximum drawdown, YASLX dropped -38.91% vs MWNIX's -58.38%.

Which has better risk-adjusted returns?

YASLX currently has the higher Sharpe Ratio (1.21 vs 0.98), 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.