SSMHX vs. SSSYX

Last updated Jun 5, 2026

SSMHX (State Street Small/Mid Cap Equity Index Portfolio) and SSSYX (State Street Equity 500 Index Fund Class K) are both mutual funds - SSMHX is a Mid Cap Growth Equities fund managed by State Street, while SSSYX is a Large Cap Blend Equities fund tracking the S&P 500 Index. Over the past 10 years, SSMHX returned 11.83%/yr vs 15.52%/yr for SSSYX. Their correlation of 0.86 suggests significant overlap in exposure. Both charge a 0.02% expense ratio.

Performance

SSMHX vs. SSSYX - Performance Comparison

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

Returns By Period

In the year-to-date period, SSMHX achieves a 13.05% return, which is significantly higher than SSSYX's 10.87% return. Over the past 10 years, SSMHX has underperformed SSSYX with an annualized return of 11.83%, while SSSYX has yielded a comparatively higher 15.52% annualized return.

SSMHX

• 1D: -0.99%
• 1M: 3.42%
• YTD: 13.05%
• 6M: 11.48%
• 1Y: 28.53%
• 3Y*: 17.77%
• 5Y*: 6.02%
• 10Y*: 11.83%

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)

SSMHX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SSMHX State Street Small/Mid Cap Equity Index Portfolio	13.05%	12.90%	10.73%	25.21%	-25.43%	13.08%	32.46%	28.00%	-9.21%	18.26%
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 SSMHX and SSSYX is 0.83, 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	0.83
Correlation (3Y) Calculated over the trailing 3-year period	0.83
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Aug 18, 2015	0.86

The correlation between SSMHX and SSSYX has been stable across timeframes, ranging from 0.83 to 0.86 - a consistent structural relationship.

Return for Risk

SSMHX vs. SSSYX — Risk / Return Rank

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

SSMHX

SSMHX Risk / Return Rank: 42
SSMHX Sharpe Ratio Rank: 35
SSMHX Sortino Ratio Rank: 34
SSMHX Omega Ratio Rank: 32
SSMHX Calmar Ratio Rank: 57
SSMHX Martin Ratio Rank: 52

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.

SSMHX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Small/Mid Cap Equity Index Portfolio (SSMHX) 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.

	SSMHX	SSSYX	Difference
Sharpe ratio: Return per unit of total volatility	1.71	2.37	-0.66
Sortino ratio: Return per unit of downside risk	2.42	3.24	-0.82
Omega ratio: Gain probability vs. loss probability	1.29	1.43	-0.13
Calmar ratio: Return relative to maximum drawdown	2.87	3.16	-0.29
Martin ratio: Return relative to average drawdown	10.43	14.79	-4.36
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SSMHX vs. SSSYX - Sharpe Ratio Comparison

The current SSMHX Sharpe Ratio is 1.71, which is comparable to the SSSYX Sharpe Ratio of 2.37. The chart below compares the historical Sharpe Ratios of SSMHX 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

	SSMHX	SSSYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.71	2.37	-0.66
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	0.83	-0.56
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.53	0.13	+0.40
Sharpe Ratio (All Time) Calculated using the full available price history	0.47	0.12	+0.35

Drawdowns

SSMHX vs. SSSYX - Drawdown Comparison

The maximum SSMHX drawdown since its inception was -41.61%, smaller than the maximum SSSYX drawdown of -91.48%. Use the drawdown chart below to compare losses from any high point for SSMHX and SSSYX.

Drawdown Indicators

	SSMHX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-41.61%	-91.48%	+49.87%
Max Drawdown (1Y) Largest decline over 1 year	-10.03%	-8.88%	-1.15%
Max Drawdown (3Y) Largest decline over 3 years	-30.38%	-18.74%	-11.64%
Max Drawdown (5Y) Largest decline over 5 years	-34.84%	-24.49%	-10.35%
Max Drawdown (10Y) Largest decline over 10 years	-41.61%	-91.48%	+49.87%
Current Drawdown Current decline from peak	-0.99%	-0.73%	-0.26%
Average Drawdown Average peak-to-trough decline	-9.14%	-4.15%	-4.99%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.76%	1.90%	+0.86%

Volatility

SSMHX vs. SSSYX - Volatility Comparison

State Street Small/Mid Cap Equity Index Portfolio (SSMHX) has a higher volatility of 4.82% compared to State Street Equity 500 Index Fund Class K (SSSYX) at 2.92%. This indicates that SSMHX's price experiences larger fluctuations and is considered to be riskier than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SSMHX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.82%	2.92%	+1.90%
Volatility (6M) Calculated over the trailing 6-month period	12.37%	8.98%	+3.39%
Volatility (1Y) Calculated over the trailing 1-year period	16.94%	11.88%	+5.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.41%	16.89%	+5.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.39%	124.43%	-102.04%

SSMHX vs. SSSYX - Expense Ratio Comparison

Both SSMHX and SSSYX have an expense ratio of 0.02%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

SSMHX vs. SSSYX - Dividend Comparison

SSMHX's dividend yield for the trailing twelve months is around 6.30%, more than SSSYX's 1.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSMHX State Street Small/Mid Cap Equity Index Portfolio	6.30%	7.12%	0.00%	1.56%	2.31%	16.30%	2.91%	3.65%	6.43%	4.01%	1.71%	0.73%
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%

Frequently Asked Questions

Can I hold both SSMHX and SSSYX in my portfolio?

SSMHX and SSSYX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SSMHX or SSSYX?

SSMHX has higher volatility (4.82%) compared to SSSYX (2.92%). In terms of maximum drawdown, SSMHX dropped -41.61% vs SSSYX's -91.48%.

Which has better risk-adjusted returns?

SSSYX currently has the higher Sharpe Ratio (2.37 vs 1.71), 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.