SVSPX vs. VIIIX

Last updated Jun 23, 2026

SVSPX (State Street S&P 500 Index Fund Class N) and VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) are both mutual funds - SVSPX is a Large Cap Blend Equities fund tracking the S&P 500 Index, while VIIIX is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 10 years, SVSPX returned 15.43%/yr vs 15.65%/yr for VIIIX. With a 0.99 correlation, they move nearly in lockstep. SVSPX charges 0.16%/yr vs 0.02%/yr for VIIIX.

Performance

SVSPX vs. VIIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street S&P 500 Index Fund Class N (SVSPX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with SVSPX having a 10.11% return and VIIIX slightly higher at 10.19%. Both investments have delivered pretty close results over the past 10 years, with SVSPX having a 15.43% annualized return and VIIIX not far ahead at 15.65%.

SVSPX

• 1D: 1.09%
• 1M: 0.84%
• YTD: 10.11%
• 6M: 9.61%
• 1Y: 26.91%
• 3Y*: 20.95%
• 5Y*: 13.98%
• 10Y*: 15.43%

VIIIX

• 1D: 1.09%
• 1M: 0.47%
• YTD: 10.19%
• 6M: 9.68%
• 1Y: 27.18%
• 3Y*: 21.39%
• 5Y*: 14.24%
• 10Y*: 15.65%

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

SVSPX vs. VIIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SVSPX State Street S&P 500 Index Fund Class N	10.11%	17.83%	25.07%	26.21%	-18.31%	28.38%	18.48%	31.27%	-4.87%	21.71%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	10.19%	17.87%	26.29%	25.79%	-18.14%	28.69%	18.41%	31.48%	-4.41%	21.82%

Correlation

The correlation between SVSPX and VIIIX is 0.79, 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	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Jul 7, 1997	0.99

The correlation between SVSPX and VIIIX shifts across timeframes, from 0.79 (1 year) to 0.99 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SVSPX vs. VIIIX — Risk / Return Rank

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

SVSPX

SVSPX Risk / Return Rank: 83
SVSPX Sharpe Ratio Rank: 84
SVSPX Sortino Ratio Rank: 81
SVSPX Omega Ratio Rank: 76
SVSPX Calmar Ratio Rank: 85
SVSPX Martin Ratio Rank: 91

VIIIX

VIIIX Risk / Return Rank: 66
VIIIX Sharpe Ratio Rank: 64
VIIIX Sortino Ratio Rank: 59
VIIIX Omega Ratio Rank: 61
VIIIX Calmar Ratio Rank: 68
VIIIX Martin Ratio Rank: 79

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.

SVSPX vs. VIIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street S&P 500 Index Fund Class N (SVSPX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). 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.

	SVSPX	VIIIX	Difference
Sharpe ratio: Return per unit of total volatility	2.53	2.17	+0.36
Sortino ratio: Return per unit of downside risk	3.51	2.93	+0.59
Omega ratio: Gain probability vs. loss probability	1.45	1.39	+0.06
Calmar ratio: Return relative to maximum drawdown	3.79	3.04	+0.75
Martin ratio: Return relative to average drawdown	17.28	13.74	+3.54

SVSPX vs. VIIIX - Sharpe Ratio Comparison

The current SVSPX Sharpe Ratio is 2.53, which is comparable to the VIIIX Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of SVSPX and VIIIX, 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

SVSPX vs. VIIIX - Drawdown Comparison

The maximum SVSPX drawdown since its inception was -55.76%, roughly equal to the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for SVSPX and VIIIX.

Drawdown Indicators

	SVSPX	VIIIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.76%	-55.18%	-0.58%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-8.90%	-0.03%
Max Drawdown (3Y) Largest decline over 3 years	-19.09%	-18.75%	-0.34%
Max Drawdown (5Y) Largest decline over 5 years	-24.59%	-24.50%	-0.09%
Max Drawdown (10Y) Largest decline over 10 years	-33.69%	-33.79%	+0.10%
Current Drawdown Current decline from peak	-1.36%	-1.36%	0.00%
Average Drawdown Average peak-to-trough decline	-9.23%	-10.00%	+0.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.91%	1.96%	-0.05%

Volatility

SVSPX vs. VIIIX - Volatility Comparison

State Street S&P 500 Index Fund Class N (SVSPX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) have volatilities of 4.88% and 4.77%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SVSPX	VIIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.88%	4.77%	+0.11%
Volatility (6M) Calculated over the trailing 6-month period	10.67%	9.91%	+0.76%
Volatility (1Y) Calculated over the trailing 1-year period	13.39%	12.47%	+0.92%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.55%	16.99%	+0.56%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.38%	18.10%	+0.28%

SVSPX vs. VIIIX - Expense Ratio Comparison

SVSPX has a 0.16% expense ratio, which is higher than VIIIX's 0.02% 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

SVSPX vs. VIIIX - Dividend Comparison

SVSPX's dividend yield for the trailing twelve months is around 7.53%, more than VIIIX's 2.44% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SVSPX State Street S&P 500 Index Fund Class N	7.53%	8.28%	9.39%	12.38%	10.53%	11.65%	15.98%	6.40%	13.29%	4.94%	8.63%	4.05%
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares	2.44%	2.11%	3.66%	2.66%	3.39%	4.79%	3.07%	2.86%	2.45%	1.84%	2.38%	2.47%

Frequently Asked Questions

Can I hold both SVSPX and VIIIX in my portfolio?

SVSPX and VIIIX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SVSPX or VIIIX?

SVSPX has higher volatility (4.88%) compared to VIIIX (4.77%). In terms of maximum drawdown, SVSPX dropped -55.76% vs VIIIX's -55.18%.

Which has better risk-adjusted returns?

SVSPX currently has the higher Sharpe Ratio (2.53 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.