VFINX vs. SSSYX

Last updated Jun 5, 2026

VFINX (Vanguard 500 Index Fund Investor Shares) and SSSYX (State Street Equity 500 Index Fund Class K) are both Large Cap Blend Equities funds. Over the past 10 years, VFINX returned 15.43%/yr vs 15.52%/yr for SSSYX. With a 0.99 correlation, they move nearly in lockstep. VFINX charges 0.14%/yr vs 0.02%/yr for SSSYX.

Performance

VFINX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard 500 Index Fund Investor Shares (VFINX) and State Street Equity 500 Index Fund Class K (SSSYX). 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 VFINX having a 10.82% return and SSSYX slightly higher at 10.87%. Both investments have delivered pretty close results over the past 10 years, with VFINX having a 15.43% annualized return and SSSYX not far ahead at 15.52%.

VFINX

• 1D: -0.74%
• 1M: 4.16%
• YTD: 10.82%
• 6M: 10.72%
• 1Y: 27.86%
• 3Y*: 22.29%
• 5Y*: 13.76%
• 10Y*: 15.43%

SSSYX

• 1D: -0.73%
• 1M: 4.17%
• YTD: 10.87%
• 6M: 10.78%
• 1Y: 27.97%
• 3Y*: 22.42%
• 5Y*: 13.87%
• 10Y*: 15.52%

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

VFINX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VFINX Vanguard 500 Index Fund Investor Shares	10.82%	17.71%	24.84%	26.12%	-18.24%	28.53%	18.20%	31.33%	-4.55%	21.66%
SSSYX State Street Equity 500 Index Fund Class K	10.87%	17.81%	24.99%	26.27%	-18.16%	28.51%	18.31%	31.38%	-4.38%	21.61%

Correlation

The correlation between VFINX and SSSYX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	0.99
Correlation (All Time) Calculated using the full available price history since Sep 19, 2014	0.99

The correlation between VFINX and SSSYX has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.

Return for Risk

VFINX vs. SSSYX — Risk / Return Rank

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

VFINX

VFINX Risk / Return Rank: 65
VFINX Sharpe Ratio Rank: 63
VFINX Sortino Ratio Rank: 58
VFINX Omega Ratio Rank: 59
VFINX Calmar Ratio Rank: 66
VFINX Martin Ratio Rank: 78

SSSYX

SSSYX Risk / Return Rank: 66
SSSYX Sharpe Ratio Rank: 64
SSSYX Sortino Ratio Rank: 59
SSSYX Omega Ratio Rank: 60
SSSYX Calmar Ratio Rank: 67
SSSYX 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.

VFINX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard 500 Index Fund Investor Shares (VFINX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.

	VFINX	SSSYX	Difference
Sharpe ratio: Return per unit of total volatility	2.36	2.37	-0.01
Sortino ratio: Return per unit of downside risk	3.22	3.24	-0.01
Omega ratio: Gain probability vs. loss probability	1.43	1.43	0.00
Calmar ratio: Return relative to maximum drawdown	3.14	3.16	-0.03
Martin ratio: Return relative to average drawdown	14.66	14.79	-0.13
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VFINX vs. SSSYX - Sharpe Ratio Comparison

The current VFINX Sharpe Ratio is 2.36, which is comparable to the SSSYX Sharpe Ratio of 2.37. The chart below compares the historical Sharpe Ratios of VFINX and SSSYX, 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

	VFINX	SSSYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.36	2.37	-0.01
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.82	0.83	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	0.13	+0.73
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.12	+0.50

Drawdowns

VFINX vs. SSSYX - Drawdown Comparison

The maximum VFINX drawdown since its inception was -55.25%, smaller than the maximum SSSYX drawdown of -91.48%. Use the drawdown chart below to compare losses from any high point for VFINX and SSSYX.

Drawdown Indicators

	VFINX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-55.25%	-91.48%	+36.23%
Max Drawdown (1Y) Largest decline over 1 year	-8.92%	-8.88%	-0.04%
Max Drawdown (3Y) Largest decline over 3 years	-18.76%	-18.74%	-0.02%
Max Drawdown (5Y) Largest decline over 5 years	-24.59%	-24.49%	-0.10%
Max Drawdown (10Y) Largest decline over 10 years	-33.83%	-91.48%	+57.65%
Current Drawdown Current decline from peak	-0.74%	-0.73%	-0.01%
Average Drawdown Average peak-to-trough decline	-8.28%	-4.15%	-4.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.91%	1.90%	+0.01%

Volatility

VFINX vs. SSSYX - Volatility Comparison

Vanguard 500 Index Fund Investor Shares (VFINX) and State Street Equity 500 Index Fund Class K (SSSYX) have volatilities of 2.93% and 2.92%, 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

	VFINX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.93%	2.92%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	8.99%	8.98%	+0.01%
Volatility (1Y) Calculated over the trailing 1-year period	11.89%	11.88%	+0.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.90%	16.89%	+0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.07%	124.43%	-106.36%

VFINX vs. SSSYX - Expense Ratio Comparison

VFINX has a 0.14% expense ratio, which is higher than SSSYX'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

VFINX vs. SSSYX - Dividend Comparison

VFINX's dividend yield for the trailing twelve months is around 0.93%, less than SSSYX's 1.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSSYX State Street Equity 500 Index Fund Class K	1.30%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%
VFINX Vanguard 500 Index Fund Investor Shares	0.93%	1.02%	1.14%	1.36%	1.57%	1.15%	1.45%	1.77%	1.94%	1.69%	1.92%	1.99%

Frequently Asked Questions

Can I hold both VFINX and SSSYX in my portfolio?

With a correlation of 1.00, VFINX and SSSYX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, VFINX or SSSYX?

VFINX has higher volatility (2.93%) compared to SSSYX (2.92%). In terms of maximum drawdown, VFINX dropped -55.25% vs SSSYX's -91.48%.

Which has better risk-adjusted returns?

SSSYX currently has the higher Sharpe Ratio (2.37 vs 2.36), 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.