VMNFX vs. IOO

Last updated Jun 9, 2026

VMNFX (Vanguard Market Neutral Fund Investor Shares) and IOO (iShares Global 100 ETF) are both funds - VMNFX is a Long-Short fund managed by Vanguard, while IOO is a Global Equities fund tracking the S&P Global 100 Index (Net). Over the past 10 years, VMNFX returned 5.00%/yr vs 16.53%/yr for IOO. At a correlation of -0.01, they often move in opposite directions. VMNFX charges 1.31%/yr vs 0.40%/yr for IOO.

Performance

VMNFX vs. IOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Market Neutral Fund Investor Shares (VMNFX) and iShares Global 100 ETF (IOO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VMNFX achieves a 12.10% return, which is significantly higher than IOO's 9.70% return. Over the past 10 years, VMNFX has underperformed IOO with an annualized return of 5.00%, while IOO has yielded a comparatively higher 16.53% annualized return.

VMNFX

• 1D: 0.19%
• 1M: 1.23%
• YTD: 12.10%
• 6M: 14.25%
• 1Y: 18.34%
• 3Y*: 13.32%
• 5Y*: 12.99%
• 10Y*: 5.00%

IOO

• 1D: 0.27%
• 1M: -0.80%
• YTD: 9.70%
• 6M: 9.96%
• 1Y: 33.76%
• 3Y*: 24.64%
• 5Y*: 16.11%
• 10Y*: 16.53%

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

VMNFX vs. IOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VMNFX Vanguard Market Neutral Fund Investor Shares	12.10%	9.27%	5.78%	12.23%	13.48%	23.24%	-11.58%	-9.57%	0.60%	-4.89%
IOO iShares Global 100 ETF	9.70%	27.02%	26.54%	27.71%	-16.34%	26.03%	18.61%	30.01%	-6.22%	23.56%

Correlation

The correlation between VMNFX and IOO is 0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.07
Correlation (3Y) Calculated over the trailing 3-year period	0.02
Correlation (5Y) Calculated over the trailing 5-year period	0.01
Correlation (10Y) Calculated over the trailing 10-year period	0.07
Correlation (All Time) Calculated using the full available price history since Dec 8, 2000	-0.01

VMNFX vs. IOO - Sectors Allocation Comparison

Sectors	VMNFX	IOO
Financial Services	19.9%	9.1%
Healthcare	13.6%	8.4%
Technology	13.0%	46.2%
Industrials	12.9%	4.8%
Consumer Cyclical	12.7%	8.4%
Real Estate	7.6%	0.2%
Basic Materials	5.6%	1.7%
Energy	4.7%	3.6%
Communication Services	3.6%	11.0%
Utilities	3.4%	0.5%
Consumer Defensive	3.0%	5.6%

Return for Risk

VMNFX vs. IOO — Risk / Return Rank

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

VMNFX

VMNFX Risk / Return Rank: 72
VMNFX Sharpe Ratio Rank: 72
VMNFX Sortino Ratio Rank: 77
VMNFX Omega Ratio Rank: 68
VMNFX Calmar Ratio Rank: 86
VMNFX Martin Ratio Rank: 57

IOO

IOO Risk / Return Rank: 81
IOO Sharpe Ratio Rank: 84
IOO Sortino Ratio Rank: 82
IOO Omega Ratio Rank: 81
IOO Calmar Ratio Rank: 74
IOO Martin Ratio Rank: 84

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.

VMNFX vs. IOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Market Neutral Fund Investor Shares (VMNFX) and iShares Global 100 ETF (IOO). 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.

	VMNFX	IOO	Difference
Sharpe ratio: Return per unit of total volatility	2.37	2.45	-0.07
Sortino ratio: Return per unit of downside risk	3.58	3.29	+0.29
Omega ratio: Gain probability vs. loss probability	1.44	1.44	0.00
Calmar ratio: Return relative to maximum drawdown	3.96	3.41	+0.55
Martin ratio: Return relative to average drawdown	11.00	15.65	-4.65
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VMNFX vs. IOO - Sharpe Ratio Comparison

The current VMNFX Sharpe Ratio is 2.37, which is comparable to the IOO Sharpe Ratio of 2.45. The chart below compares the historical Sharpe Ratios of VMNFX and IOO, 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

	VMNFX	IOO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.37	2.45	-0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.81	0.95	+0.86
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.79	0.93	-0.15
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	0.39	-0.05

Drawdowns

VMNFX vs. IOO - Drawdown Comparison

The maximum VMNFX drawdown since its inception was -26.42%, smaller than the maximum IOO drawdown of -55.85%. Use the drawdown chart below to compare losses from any high point for VMNFX and IOO.

Drawdown Indicators

	VMNFX	IOO	Difference
Max Drawdown Largest peak-to-trough decline	-26.42%	-55.85%	+29.43%
Max Drawdown (1Y) Largest decline over 1 year	-4.65%	-9.94%	+5.29%
Max Drawdown (3Y) Largest decline over 3 years	-5.44%	-19.19%	+13.75%
Max Drawdown (5Y) Largest decline over 5 years	-6.75%	-23.52%	+16.77%
Max Drawdown (10Y) Largest decline over 10 years	-25.09%	-31.43%	+6.34%
Current Drawdown Current decline from peak	0.00%	-3.57%	+3.57%
Average Drawdown Average peak-to-trough decline	-8.75%	-11.27%	+2.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.67%	2.16%	-0.49%

Volatility

VMNFX vs. IOO - Volatility Comparison

The current volatility for Vanguard Market Neutral Fund Investor Shares (VMNFX) is 1.83%, while iShares Global 100 ETF (IOO) has a volatility of 4.47%. This indicates that VMNFX experiences smaller price fluctuations and is considered to be less risky than IOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VMNFX	IOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.83%	4.47%	-2.64%
Volatility (6M) Calculated over the trailing 6-month period	5.65%	11.04%	-5.39%
Volatility (1Y) Calculated over the trailing 1-year period	7.76%	13.88%	-6.12%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.21%	17.09%	-9.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.38%	17.80%	-11.42%

VMNFX vs. IOO - Expense Ratio Comparison

VMNFX has a 1.31% expense ratio, which is higher than IOO's 0.40% expense ratio.

Dividends

VMNFX vs. IOO - Dividend Comparison

VMNFX's dividend yield for the trailing twelve months is around 3.13%, more than IOO's 0.84% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IOO iShares Global 100 ETF	0.84%	0.92%	1.08%	1.49%	2.00%	1.53%	1.49%	2.02%	2.54%	2.23%	2.75%	2.89%
VMNFX Vanguard Market Neutral Fund Investor Shares	3.13%	3.53%	5.61%	5.09%	0.75%	0.16%	0.81%	3.16%	0.94%	1.07%	0.38%	0.02%

Frequently Asked Questions

Can I hold both VMNFX and IOO in my portfolio?

VMNFX and IOO have a correlation of 0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VMNFX or IOO?

IOO has higher volatility (4.47%) compared to VMNFX (1.83%). In terms of maximum drawdown, VMNFX dropped -26.42% vs IOO's -55.85%.

Which has better risk-adjusted returns?

IOO currently has the higher Sharpe Ratio (2.45 vs 2.37), 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.