VMMSX vs. WXCIX

Last updated Jun 4, 2026

VMMSX (Vanguard Emerging Markets Select Stock Fund) and WXCIX (William Blair Emerging Markets ex China Growth Fund Class I) are both Emerging Markets Equities funds. Over the past 3 years, VMMSX returned 22.11%/yr vs 35.39%/yr for WXCIX. A 0.60 correlation means they provide meaningful diversification when combined. VMMSX charges 0.84%/yr vs 0.99%/yr for WXCIX.

Performance

VMMSX vs. WXCIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Emerging Markets Select Stock Fund (VMMSX) and William Blair Emerging Markets ex China Growth Fund Class I (WXCIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VMMSX achieves a 20.95% return, which is significantly lower than WXCIX's 51.69% return.

VMMSX

• 1D: 1.46%
• 1M: 5.99%
• YTD: 20.95%
• 6M: 22.99%
• 1Y: 48.86%
• 3Y*: 22.11%
• 5Y*: 6.94%
• 10Y*: 10.72%

WXCIX

• 1D: -0.53%
• 1M: 10.62%
• YTD: 51.69%
• 6M: 57.23%
• 1Y: 91.16%
• 3Y*: 35.39%
• 5Y*: —
• 10Y*: —

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

VMMSX vs. WXCIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
VMMSX Vanguard Emerging Markets Select Stock Fund	20.95%	35.68%	5.91%	5.59%
WXCIX William Blair Emerging Markets ex China Growth Fund Class I	51.69%	28.21%	13.49%	15.55%

Correlation

The correlation between VMMSX and WXCIX is 0.66, 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	0.66
Correlation (3Y) Calculated over the trailing 3-year period	0.60
Correlation (All Time) Calculated using the full available price history since May 18, 2023	0.60

The correlation between VMMSX and WXCIX has been stable across timeframes, ranging from 0.60 to 0.66 - a consistent structural relationship.

Return for Risk

VMMSX vs. WXCIX — Risk / Return Rank

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

VMMSX

VMMSX Risk / Return Rank: 82
VMMSX Sharpe Ratio Rank: 90
VMMSX Sortino Ratio Rank: 79
VMMSX Omega Ratio Rank: 83
VMMSX Calmar Ratio Rank: 80
VMMSX Martin Ratio Rank: 77

WXCIX

WXCIX Risk / Return Rank: 95
WXCIX Sharpe Ratio Rank: 98
WXCIX Sortino Ratio Rank: 94
WXCIX Omega Ratio Rank: 92
WXCIX Calmar Ratio Rank: 96
WXCIX Martin Ratio Rank: 95

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.

VMMSX vs. WXCIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Emerging Markets Select Stock Fund (VMMSX) and William Blair Emerging Markets ex China Growth Fund Class I (WXCIX). 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.

	VMMSX	WXCIX	Difference
Sharpe ratio: Return per unit of total volatility	2.96	4.10	-1.14
Sortino ratio: Return per unit of downside risk	3.76	4.94	-1.17
Omega ratio: Gain probability vs. loss probability	1.55	1.70	-0.15
Calmar ratio: Return relative to maximum drawdown	3.66	6.25	-2.59
Martin ratio: Return relative to average drawdown	14.53	22.44	-7.91
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VMMSX vs. WXCIX - Sharpe Ratio Comparison

The current VMMSX Sharpe Ratio is 2.96, which is comparable to the WXCIX Sharpe Ratio of 4.10. The chart below compares the historical Sharpe Ratios of VMMSX and WXCIX, 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

	VMMSX	WXCIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.96	4.10	-1.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.39	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.33	2.02	-1.70

Drawdowns

VMMSX vs. WXCIX - Drawdown Comparison

The maximum VMMSX drawdown since its inception was -39.28%, which is greater than WXCIX's maximum drawdown of -19.66%. Use the drawdown chart below to compare losses from any high point for VMMSX and WXCIX.

Drawdown Indicators

	VMMSX	WXCIX	Difference
Max Drawdown Largest peak-to-trough decline	-39.28%	-19.66%	-19.62%
Max Drawdown (1Y) Largest decline over 1 year	-13.46%	-14.78%	+1.32%
Max Drawdown (3Y) Largest decline over 3 years	-18.37%	-19.66%	+1.29%
Max Drawdown (5Y) Largest decline over 5 years	-37.39%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-38.82%	—	—
Current Drawdown Current decline from peak	0.00%	-0.53%	+0.53%
Average Drawdown Average peak-to-trough decline	-13.41%	-3.15%	-10.26%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.38%	4.10%	-0.72%

Volatility

VMMSX vs. WXCIX - Volatility Comparison

The current volatility for Vanguard Emerging Markets Select Stock Fund (VMMSX) is 6.08%, while William Blair Emerging Markets ex China Growth Fund Class I (WXCIX) has a volatility of 10.26%. This indicates that VMMSX experiences smaller price fluctuations and is considered to be less risky than WXCIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VMMSX	WXCIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.08%	10.26%	-4.18%
Volatility (6M) Calculated over the trailing 6-month period	13.89%	19.46%	-5.57%
Volatility (1Y) Calculated over the trailing 1-year period	16.63%	22.49%	-5.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.78%	17.98%	-0.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.38%	17.98%	+0.40%

VMMSX vs. WXCIX - Expense Ratio Comparison

VMMSX has a 0.84% expense ratio, which is lower than WXCIX's 0.99% expense ratio.

Dividends

VMMSX vs. WXCIX - Dividend Comparison

VMMSX's dividend yield for the trailing twelve months is around 1.92%, less than WXCIX's 3.64% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VMMSX Vanguard Emerging Markets Select Stock Fund	1.92%	2.32%	3.33%	3.05%	3.71%	6.80%	1.04%	2.04%	2.53%	1.54%	1.44%	1.87%
WXCIX William Blair Emerging Markets ex China Growth Fund Class I	3.64%	5.52%	0.00%	0.83%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both VMMSX and WXCIX in my portfolio?

VMMSX and WXCIX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VMMSX or WXCIX?

WXCIX has higher volatility (10.26%) compared to VMMSX (6.08%). In terms of maximum drawdown, VMMSX dropped -39.28% vs WXCIX's -19.66%.

Which has better risk-adjusted returns?

WXCIX currently has the higher Sharpe Ratio (4.10 vs 2.96), 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.