VGTSX vs. VOO

Last updated Jun 23, 2026

VGTSX (Vanguard Total International Stock Index Fund Investor Shares) and VOO (Vanguard S&P 500 ETF) are both funds - VGTSX is a Foreign Large Cap Equities fund managed by Vanguard, while VOO is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, VGTSX returned 9.90%/yr vs 15.77%/yr for VOO. Their correlation of 0.81 suggests significant overlap in exposure. VGTSX charges 0.17%/yr vs 0.03%/yr for VOO.

Performance

VGTSX vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total International Stock Index Fund Investor Shares (VGTSX) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, VGTSX achieves a 15.59% return, which is significantly higher than VOO's 9.75% return. Over the past 10 years, VGTSX has underperformed VOO with an annualized return of 9.90%, while VOO has yielded a comparatively higher 15.77% annualized return.

VGTSX

• 1D: 1.37%
• 1M: 3.12%
• YTD: 15.59%
• 6M: 16.26%
• 1Y: 33.92%
• 3Y*: 18.51%
• 5Y*: 9.18%
• 10Y*: 9.90%

VOO

• 1D: -0.29%
• 1M: 0.08%
• YTD: 9.75%
• 6M: 9.30%
• 1Y: 26.77%
• 3Y*: 21.36%
• 5Y*: 13.58%
• 10Y*: 15.77%

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

VGTSX vs. VOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VGTSX Vanguard Total International Stock Index Fund Investor Shares	15.59%	32.05%	5.30%	15.18%	-16.07%	8.58%	11.15%	21.44%	-14.47%	27.39%
VOO Vanguard S&P 500 ETF	9.75%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	21.77%

Correlation

The correlation between VGTSX and VOO is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.75
Correlation (5Y) Calculated over the trailing 5-year period	0.77
Correlation (10Y) Calculated over the trailing 10-year period	0.79
Correlation (All Time) Calculated using the full available price history since Sep 9, 2010	0.81

The correlation between VGTSX and VOO has been stable across timeframes, ranging from 0.75 to 0.81 - a consistent structural relationship.

Return for Risk

VGTSX vs. VOO — Risk / Return Rank

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

VGTSX

VGTSX Risk / Return Rank: 63
VGTSX Sharpe Ratio Rank: 66
VGTSX Sortino Ratio Rank: 60
VGTSX Omega Ratio Rank: 65
VGTSX Calmar Ratio Rank: 64
VGTSX Martin Ratio Rank: 61

VOO

VOO Risk / Return Rank: 68
VOO Sharpe Ratio Rank: 70
VOO Sortino Ratio Rank: 67
VOO Omega Ratio Rank: 69
VOO Calmar Ratio Rank: 63
VOO Martin Ratio Rank: 74

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.

VGTSX vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total International Stock Index Fund Investor Shares (VGTSX) and Vanguard S&P 500 ETF (VOO). 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.

	VGTSX	VOO	Difference
Sharpe ratio: Return per unit of total volatility	2.19	2.17	+0.02
Sortino ratio: Return per unit of downside risk	2.96	2.93	+0.03
Omega ratio: Gain probability vs. loss probability	1.41	1.39	+0.01
Calmar ratio: Return relative to maximum drawdown	2.93	3.02	-0.09
Martin ratio: Return relative to average drawdown	11.39	13.58	-2.20

VGTSX vs. VOO - Sharpe Ratio Comparison

The current VGTSX Sharpe Ratio is 2.19, which is comparable to the VOO Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of VGTSX and VOO, 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

VGTSX vs. VOO - Drawdown Comparison

The maximum VGTSX drawdown since its inception was -61.48%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for VGTSX and VOO.

Drawdown Indicators

	VGTSX	VOO	Difference
Max Drawdown Largest peak-to-trough decline	-61.48%	-33.99%	-27.49%
Max Drawdown (1Y) Largest decline over 1 year	-11.29%	-8.90%	-2.39%
Max Drawdown (3Y) Largest decline over 3 years	-13.11%	-18.69%	+5.58%
Max Drawdown (5Y) Largest decline over 5 years	-29.56%	-24.52%	-5.04%
Max Drawdown (10Y) Largest decline over 10 years	-35.93%	-33.99%	-1.94%
Current Drawdown Current decline from peak	0.00%	-1.74%	+1.74%
Average Drawdown Average peak-to-trough decline	-13.95%	-3.68%	-10.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.90%	1.98%	+0.92%

Volatility

VGTSX vs. VOO - Volatility Comparison

Vanguard Total International Stock Index Fund Investor Shares (VGTSX) has a higher volatility of 6.14% compared to Vanguard S&P 500 ETF (VOO) at 4.60%. This indicates that VGTSX's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VGTSX	VOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.14%	4.60%	+1.54%
Volatility (6M) Calculated over the trailing 6-month period	13.06%	9.73%	+3.33%
Volatility (1Y) Calculated over the trailing 1-year period	15.10%	12.39%	+2.71%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.20%	16.90%	-1.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.97%	18.05%	-2.08%

VGTSX vs. VOO - Expense Ratio Comparison

VGTSX has a 0.17% expense ratio, which is higher than VOO's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

VGTSX vs. VOO - Dividend Comparison

VGTSX's dividend yield for the trailing twelve months is around 2.42%, more than VOO's 1.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
VGTSX Vanguard Total International Stock Index Fund Investor Shares	2.42%	3.08%	3.26%	3.16%	2.98%	2.99%	2.05%	2.98%	3.09%	2.68%	2.86%	2.77%
VOO Vanguard S&P 500 ETF	1.04%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both VGTSX and VOO in my portfolio?

VGTSX and VOO have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VGTSX or VOO?

VGTSX has higher volatility (6.14%) compared to VOO (4.60%). In terms of maximum drawdown, VGTSX dropped -61.48% vs VOO's -33.99%.

Which has better risk-adjusted returns?

VGTSX currently has the higher Sharpe Ratio (2.19 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.