SSASX vs. SSSYX

Last updated Apr 2, 2026

Compare and contrast key facts about State Street Income Fund (SSASX) and State Street Equity 500 Index Fund Class K (SSSYX).

SSASX is managed by State Street. It was launched on Jan 2, 1980. SSSYX is a passively managed fund by State Street that tracks the performance of the S&P 500 Index. It was launched on Sep 17, 2014.

Performance

SSASX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Income Fund (SSASX) and State Street Equity 500 Index Fund Class K (SSSYX). The values are adjusted to include any dividend payments, if applicable.

SSASX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
SSASX State Street Income Fund	-0.41%	7.49%	-0.95%	4.83%	-13.74%	0.59%
SSSYX State Street Equity 500 Index Fund Class K	-4.34%	17.81%	24.99%	26.27%	-18.16%	14.43%

Returns By Period

In the year-to-date period, SSASX achieves a -0.41% return, which is significantly higher than SSSYX's -4.34% return.

SSASX

• 1D: 0.20%
• 1M: -1.79%
• YTD: -0.41%
• 6M: 0.27%
• 1Y: 3.60%
• 3Y*: 2.48%
• 5Y*: —
• 10Y*: —

SSSYX

• 1D: 2.92%
• 1M: -5.02%
• YTD: -4.34%
• 6M: -2.15%
• 1Y: 17.29%
• 3Y*: 18.28%
• 5Y*: 11.75%
• 10Y*: 14.02%

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

SSASX vs. SSSYX - Expense Ratio Comparison

SSASX has a 0.20% 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%.

SSASX

State Street Income Fund

SSSYX

State Street Equity 500 Index Fund Class K

Return for Risk

SSASX vs. SSSYX — Risk / Return Rank

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

SSASX

SSASX Risk / Return Rank: 30
SSASX Sharpe Ratio Rank: 30
SSASX Sortino Ratio Rank: 27
SSASX Omega Ratio Rank: 20
SSASX Calmar Ratio Rank: 47
SSASX Martin Ratio Rank: 29

SSSYX

SSSYX Risk / Return Rank: 59
SSSYX Sharpe Ratio Rank: 48
SSSYX Sortino Ratio Rank: 53
SSSYX Omega Ratio Rank: 55
SSSYX Calmar Ratio Rank: 64
SSSYX Martin Ratio Rank: 75

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.

SSASX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Income Fund (SSASX) 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.

	SSASX	SSSYX	Difference
Sharpe ratio Return per unit of total volatility	0.82	0.97	-0.15
Sortino ratio Return per unit of downside risk	1.18	1.49	-0.32
Omega ratio Gain probability vs. loss probability	1.15	1.23	-0.08
Calmar ratio Return relative to maximum drawdown	1.45	1.52	-0.07
Martin ratio Return relative to average drawdown	3.96	7.30	-3.34
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SSASX vs. SSSYX - Sharpe Ratio Comparison

The current SSASX Sharpe Ratio is 0.82, which is comparable to the SSSYX Sharpe Ratio of 0.97. The chart below compares the historical Sharpe Ratios of SSASX and SSSYX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	SSASX	SSSYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.82	0.97	-0.15
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.70	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.11	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.11	0.11	-0.22

Correlation

The correlation between SSASX and SSSYX is 0.13, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

SSASX vs. SSSYX - Dividend Comparison

SSASX's dividend yield for the trailing twelve months is around 3.65%, more than SSSYX's 1.51% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSASX State Street Income Fund	3.65%	4.01%	2.76%	2.86%	2.48%	3.77%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SSSYX State Street Equity 500 Index Fund Class K	1.51%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%

Drawdowns

SSASX vs. SSSYX - Drawdown Comparison

The maximum SSASX drawdown since its inception was -19.65%, smaller than the maximum SSSYX drawdown of -91.48%. Use the drawdown chart below to compare losses from any high point for SSASX and SSSYX.

Drawdown Indicators

	SSASX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-19.65%	-91.48%	+71.83%
Max Drawdown (1Y) Largest decline over 1 year	-3.12%	-12.10%	+8.98%
Max Drawdown (5Y) Largest decline over 5 years	—	-24.49%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-91.48%	—
Current Drawdown Current decline from peak	-5.65%	-6.22%	+0.57%
Average Drawdown Average peak-to-trough decline	-9.83%	-4.20%	-5.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.14%	2.52%	-1.38%

Volatility

SSASX vs. SSSYX - Volatility Comparison

The current volatility for State Street Income Fund (SSASX) is 1.58%, while State Street Equity 500 Index Fund Class K (SSSYX) has a volatility of 5.34%. This indicates that SSASX experiences smaller price fluctuations and is considered to be less risky than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SSASX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.58%	5.34%	-3.76%
Volatility (6M) Calculated over the trailing 6-month period	2.76%	9.53%	-6.77%
Volatility (1Y) Calculated over the trailing 1-year period	4.81%	18.29%	-13.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.56%	16.89%	-10.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.56%	124.43%	-117.87%