SUSIX vs. SSAFX

Last updated Jun 3, 2026

SUSIX (State Street Institutional U.S. Equity Fund) and SSAFX (State Street Aggregate Bond Index Portfolio) are both mutual funds - SUSIX is a Large Cap Blend Equities fund managed by State Street, while SSAFX is a Intermediate Core Bond fund managed by State Street. Over the past 10 years, SUSIX returned 15.68%/yr vs 27.82%/yr for SSAFX. At a correlation of -0.05, they often move in opposite directions. SUSIX charges 0.37%/yr vs 0.02%/yr for SSAFX.

Performance

SUSIX vs. SSAFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Institutional U.S. Equity Fund (SUSIX) and State Street Aggregate Bond Index Portfolio (SSAFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SUSIX achieves a 8.06% return, which is significantly higher than SSAFX's 0.37% return. Over the past 10 years, SUSIX has underperformed SSAFX with an annualized return of 15.68%, while SSAFX has yielded a comparatively higher 27.82% annualized return.

SUSIX

• 1D: 0.28%
• 1M: 4.21%
• YTD: 8.06%
• 6M: 8.24%
• 1Y: 26.19%
• 3Y*: 21.63%
• 5Y*: 13.28%
• 10Y*: 15.68%

SSAFX

• 1D: -0.09%
• 1M: 0.11%
• YTD: 0.37%
• 6M: 0.42%
• 1Y: 5.32%
• 3Y*: 3.88%
• 5Y*: 0.04%
• 10Y*: 27.82%

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

SUSIX vs. SSAFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SUSIX State Street Institutional U.S. Equity Fund	8.06%	17.16%	25.02%	28.63%	-18.03%	26.46%	23.02%	32.36%	-3.41%	20.75%
SSAFX State Street Aggregate Bond Index Portfolio	0.37%	6.81%	1.34%	5.61%	-13.30%	-1.72%	978.57%	8.69%	-0.12%	3.38%

Correlation

The correlation between SUSIX and SSAFX is 0.26, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.26
Correlation (3Y) Calculated over the trailing 3-year period	0.21
Correlation (5Y) Calculated over the trailing 5-year period	0.14
Correlation (10Y) Calculated over the trailing 10-year period	-0.00
Correlation (All Time) Calculated using the full available price history since Sep 23, 2014	-0.05

The correlation between SUSIX and SSAFX shifts across timeframes, from -0.05 (all time) to 0.26 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

SUSIX vs. SSAFX — Risk / Return Rank

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

SUSIX

SUSIX Risk / Return Rank: 52
SUSIX Sharpe Ratio Rank: 57
SUSIX Sortino Ratio Rank: 53
SUSIX Omega Ratio Rank: 54
SUSIX Calmar Ratio Rank: 43
SUSIX Martin Ratio Rank: 53

SSAFX

SSAFX Risk / Return Rank: 22
SSAFX Sharpe Ratio Rank: 21
SSAFX Sortino Ratio Rank: 22
SSAFX Omega Ratio Rank: 19
SSAFX Calmar Ratio Rank: 25
SSAFX Martin Ratio Rank: 22

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.

SUSIX vs. SSAFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Institutional U.S. Equity Fund (SUSIX) and State Street Aggregate Bond Index Portfolio (SSAFX). 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.

	SUSIX	SSAFX	Difference
Sharpe ratio Return per unit of total volatility	2.23	1.35	+0.88
Sortino ratio Return per unit of downside risk	3.07	2.02	+1.05
Omega ratio Gain probability vs. loss probability	1.40	1.24	+0.17
Calmar ratio Return relative to maximum drawdown	2.49	1.91	+0.58
Martin ratio Return relative to average drawdown	10.73	5.88	+4.85
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SUSIX vs. SSAFX - Sharpe Ratio Comparison

The current SUSIX Sharpe Ratio is 2.23, which is higher than the SSAFX Sharpe Ratio of 1.35. The chart below compares the historical Sharpe Ratios of SUSIX and SSAFX, 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

	SUSIX	SSAFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.23	1.35	+0.88
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.77	0.01	+0.77
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.87	0.10	+0.77
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.09	+0.41

Drawdowns

SUSIX vs. SSAFX - Drawdown Comparison

The maximum SUSIX drawdown since its inception was -51.69%, which is greater than SSAFX's maximum drawdown of -18.74%. Use the drawdown chart below to compare losses from any high point for SUSIX and SSAFX.

Drawdown Indicators

	SUSIX	SSAFX	Difference
Max Drawdown Largest peak-to-trough decline	-51.69%	-18.74%	-32.95%
Max Drawdown (1Y) Largest decline over 1 year	-10.69%	-2.74%	-7.95%
Max Drawdown (3Y) Largest decline over 3 years	-18.71%	-6.09%	-12.62%
Max Drawdown (5Y) Largest decline over 5 years	-24.45%	-18.10%	-6.35%
Max Drawdown (10Y) Largest decline over 10 years	-32.62%	-18.74%	-13.88%
Current Drawdown Current decline from peak	0.00%	-2.66%	+2.66%
Average Drawdown Average peak-to-trough decline	-7.78%	-4.41%	-3.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.48%	0.89%	+1.59%

Volatility

SUSIX vs. SSAFX - Volatility Comparison

State Street Institutional U.S. Equity Fund (SUSIX) has a higher volatility of 2.99% compared to State Street Aggregate Bond Index Portfolio (SSAFX) at 1.30%. This indicates that SUSIX's price experiences larger fluctuations and is considered to be riskier than SSAFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SUSIX	SSAFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.99%	1.30%	+1.69%
Volatility (6M) Calculated over the trailing 6-month period	9.26%	2.66%	+6.60%
Volatility (1Y) Calculated over the trailing 1-year period	12.01%	3.75%	+8.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.28%	5.95%	+11.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.05%	277.51%	-259.46%

SUSIX vs. SSAFX - Expense Ratio Comparison

SUSIX has a 0.37% expense ratio, which is higher than SSAFX's 0.02% expense ratio.

Dividends

SUSIX vs. SSAFX - Dividend Comparison

SUSIX's dividend yield for the trailing twelve months is around 7.02%, more than SSAFX's 4.17% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SSAFX State Street Aggregate Bond Index Portfolio	4.17%	3.70%	3.76%	3.16%	2.49%	1.90%	2.41%	2.88%	2.82%	2.42%	2.21%	3.21%
SUSIX State Street Institutional U.S. Equity Fund	7.02%	7.58%	15.35%	1.66%	57.55%	13.56%	4.65%	6.40%	16.03%	26.98%	6.88%	21.28%

Frequently Asked Questions

Can I hold both SUSIX and SSAFX in my portfolio?

SUSIX and SSAFX have a correlation of 0.26, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SUSIX or SSAFX?

SUSIX has higher volatility (2.99%) compared to SSAFX (1.30%). In terms of maximum drawdown, SUSIX dropped -51.69% vs SSAFX's -18.74%.

Which has better risk-adjusted returns?

SUSIX currently has the higher Sharpe Ratio (2.23 vs 1.35), 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.