SSAIX vs. VOO

Last updated Jun 24, 2026

SSAIX (State Street International Stock Selection Fund) and VOO (Vanguard S&P 500 ETF) are both funds - SSAIX is a Foreign Large Cap Equities fund managed by State Street, while VOO is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, SSAIX returned 9.13%/yr vs 15.61%/yr for VOO. A 0.68 correlation means they provide meaningful diversification when combined. SSAIX charges 1.00%/yr vs 0.03%/yr for VOO.

Performance

SSAIX vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street International Stock Selection Fund (SSAIX) 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, SSAIX achieves a 11.52% return, which is significantly higher than VOO's 8.19% return. Over the past 10 years, SSAIX has underperformed VOO with an annualized return of 9.13%, while VOO has yielded a comparatively higher 15.61% annualized return.

SSAIX

• 1D: 0.31%
• 1M: 1.78%
• YTD: 11.52%
• 6M: 1.27%
• 1Y: 22.56%
• 3Y*: 19.44%
• 5Y*: 10.05%
• 10Y*: 9.13%

VOO

• 1D: -1.42%
• 1M: -1.34%
• YTD: 8.19%
• 6M: 7.24%
• 1Y: 23.69%
• 3Y*: 20.78%
• 5Y*: 13.13%
• 10Y*: 15.61%

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

SSAIX vs. VOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SSAIX State Street International Stock Selection Fund	11.52%	31.50%	7.90%	17.53%	-13.60%	12.77%	2.88%	16.78%	-17.69%	22.21%
VOO Vanguard S&P 500 ETF	8.19%	17.82%	24.98%	26.32%	-18.17%	28.79%	18.32%	31.37%	-4.50%	21.77%

Correlation

The correlation between SSAIX and VOO is 0.54, 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	0.54
Correlation (3Y) Calculated over the trailing 3-year period	0.53
Correlation (5Y) Calculated over the trailing 5-year period	0.63
Correlation (10Y) Calculated over the trailing 10-year period	0.64
Correlation (All Time) Calculated using the full available price history since Sep 9, 2010	0.68

The correlation between SSAIX and VOO shifts across timeframes, from 0.53 (3 years) to 0.68 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SSAIX vs. VOO — Risk / Return Rank

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

SSAIX

SSAIX Risk / Return Rank: 36
SSAIX Sharpe Ratio Rank: 32
SSAIX Sortino Ratio Rank: 25
SSAIX Omega Ratio Rank: 40
SSAIX Calmar Ratio Rank: 48
SSAIX Martin Ratio Rank: 33

VOO

VOO Risk / Return Rank: 59
VOO Sharpe Ratio Rank: 59
VOO Sortino Ratio Rank: 56
VOO Omega Ratio Rank: 58
VOO Calmar Ratio Rank: 56
VOO Martin Ratio Rank: 67

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.

SSAIX vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street International Stock Selection Fund (SSAIX) 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.

	SSAIX	VOO	Difference
Sharpe ratio: Return per unit of total volatility	1.51	1.91	-0.40
Sortino ratio: Return per unit of downside risk	1.92	2.60	-0.68
Omega ratio: Gain probability vs. loss probability	1.31	1.35	-0.03
Calmar ratio: Return relative to maximum drawdown	2.55	2.67	-0.12
Martin ratio: Return relative to average drawdown	7.12	11.96	-4.84

SSAIX vs. VOO - Sharpe Ratio Comparison

The current SSAIX Sharpe Ratio is 1.51, which is comparable to the VOO Sharpe Ratio of 1.91. The chart below compares the historical Sharpe Ratios of SSAIX 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

SSAIX vs. VOO - Drawdown Comparison

The maximum SSAIX drawdown since its inception was -61.30%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for SSAIX and VOO.

Drawdown Indicators

	SSAIX	VOO	Difference
Max Drawdown Largest peak-to-trough decline	-61.30%	-33.99%	-27.31%
Max Drawdown (1Y) Largest decline over 1 year	-10.98%	-8.90%	-2.08%
Max Drawdown (3Y) Largest decline over 3 years	-13.00%	-18.69%	+5.69%
Max Drawdown (5Y) Largest decline over 5 years	-29.25%	-24.52%	-4.73%
Max Drawdown (10Y) Largest decline over 10 years	-41.34%	-33.99%	-7.35%
Current Drawdown Current decline from peak	-0.93%	-3.14%	+2.21%
Average Drawdown Average peak-to-trough decline	-15.79%	-3.68%	-12.11%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.57%	1.99%	+1.58%

Volatility

SSAIX vs. VOO - Volatility Comparison

The current volatility for State Street International Stock Selection Fund (SSAIX) is 4.46%, while Vanguard S&P 500 ETF (VOO) has a volatility of 4.83%. This indicates that SSAIX experiences smaller price fluctuations and is considered to be less risky than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SSAIX	VOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.46%	4.83%	-0.37%
Volatility (6M) Calculated over the trailing 6-month period	15.75%	9.82%	+5.93%
Volatility (1Y) Calculated over the trailing 1-year period	18.53%	12.46%	+6.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.88%	16.91%	-0.03%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.00%	18.02%	-1.02%

SSAIX vs. VOO - Expense Ratio Comparison

SSAIX has a 1.00% expense ratio, which is higher than VOO's 0.03% expense ratio.

Dividends

SSAIX vs. VOO - Dividend Comparison

SSAIX has not paid dividends to shareholders, while VOO's dividend yield for the trailing twelve months is around 1.05%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSAIX State Street International Stock Selection Fund	0.00%	0.00%	3.64%	5.68%	3.47%	4.55%	1.88%	3.34%	5.99%	3.63%	2.74%	2.55%
VOO Vanguard S&P 500 ETF	1.05%	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 SSAIX and VOO in my portfolio?

SSAIX and VOO have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SSAIX or VOO?

VOO has higher volatility (4.83%) compared to SSAIX (4.46%). In terms of maximum drawdown, SSAIX dropped -61.30% vs VOO's -33.99%.

Which has better risk-adjusted returns?

VOO currently has the higher Sharpe Ratio (1.91 vs 1.51), 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.