SSBRX vs. SSAFX

Last updated Jun 3, 2026

SSBRX (State Street Target Retirement 2025 Fund) and SSAFX (State Street Aggregate Bond Index Portfolio) are both mutual funds - SSBRX is a Target Retirement Date fund managed by State Street, while SSAFX is a Intermediate Core Bond fund managed by State Street. Over the past 10 years, SSBRX returned 7.93%/yr vs 27.82%/yr for SSAFX. At a 0.16 correlation, their price movements are largely independent. SSBRX charges 0.13%/yr vs 0.02%/yr for SSAFX.

Performance

SSBRX vs. SSAFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Target Retirement 2025 Fund (SSBRX) 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, SSBRX achieves a 6.58% return, which is significantly higher than SSAFX's 0.37% return. Over the past 10 years, SSBRX has underperformed SSAFX with an annualized return of 7.93%, while SSAFX has yielded a comparatively higher 27.82% annualized return.

SSBRX

• 1D: 0.00%
• 1M: 1.66%
• YTD: 6.58%
• 6M: 7.07%
• 1Y: 15.67%
• 3Y*: 11.91%
• 5Y*: 5.39%
• 10Y*: 7.93%

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)

SSBRX vs. SSAFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SSBRX State Street Target Retirement 2025 Fund	6.58%	12.93%	8.73%	13.61%	-15.51%	10.03%	14.68%	20.73%	-5.47%	14.32%
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 SSBRX and SSAFX is 0.52, 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	0.52
Correlation (3Y) Calculated over the trailing 3-year period	0.50
Correlation (5Y) Calculated over the trailing 5-year period	0.41
Correlation (10Y) Calculated over the trailing 10-year period	0.22
Correlation (All Time) Calculated using the full available price history since Oct 2, 2014	0.16

Over the past year, SSBRX and SSAFX have become more correlated (0.52) than their long-term average of 0.16, meaning their price movements have been converging.

Return for Risk

SSBRX vs. SSAFX — Risk / Return Rank

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

SSBRX

SSBRX Risk / Return Rank: 86
SSBRX Sharpe Ratio Rank: 89
SSBRX Sortino Ratio Rank: 88
SSBRX Omega Ratio Rank: 86
SSBRX Calmar Ratio Rank: 79
SSBRX Martin Ratio Rank: 86

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.

SSBRX vs. SSAFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Target Retirement 2025 Fund (SSBRX) 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.

	SSBRX	SSAFX	Difference
Sharpe ratio Return per unit of total volatility	2.92	1.35	+1.58
Sortino ratio Return per unit of downside risk	4.24	2.02	+2.22
Omega ratio Gain probability vs. loss probability	1.58	1.24	+0.35
Calmar ratio Return relative to maximum drawdown	3.62	1.91	+1.70
Martin ratio Return relative to average drawdown	16.50	5.88	+10.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SSBRX vs. SSAFX - Sharpe Ratio Comparison

The current SSBRX Sharpe Ratio is 2.92, which is higher than the SSAFX Sharpe Ratio of 1.35. The chart below compares the historical Sharpe Ratios of SSBRX 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

	SSBRX	SSAFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.92	1.35	+1.58
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.61	0.01	+0.61
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.81	0.10	+0.71
Sharpe Ratio (All Time) Calculated using the full available price history	0.74	0.09	+0.64

Drawdowns

SSBRX vs. SSAFX - Drawdown Comparison

The maximum SSBRX drawdown since its inception was -21.96%, which is greater than SSAFX's maximum drawdown of -18.74%. Use the drawdown chart below to compare losses from any high point for SSBRX and SSAFX.

Drawdown Indicators

	SSBRX	SSAFX	Difference
Max Drawdown Largest peak-to-trough decline	-21.96%	-18.74%	-3.22%
Max Drawdown (1Y) Largest decline over 1 year	-4.44%	-2.74%	-1.70%
Max Drawdown (3Y) Largest decline over 3 years	-7.48%	-6.09%	-1.39%
Max Drawdown (5Y) Largest decline over 5 years	-21.13%	-18.10%	-3.03%
Max Drawdown (10Y) Largest decline over 10 years	-21.96%	-18.74%	-3.22%
Current Drawdown Current decline from peak	0.00%	-2.66%	+2.66%
Average Drawdown Average peak-to-trough decline	-3.72%	-4.41%	+0.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.97%	0.89%	+0.08%

Volatility

SSBRX vs. SSAFX - Volatility Comparison

State Street Target Retirement 2025 Fund (SSBRX) has a higher volatility of 1.74% compared to State Street Aggregate Bond Index Portfolio (SSAFX) at 1.30%. This indicates that SSBRX'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

	SSBRX	SSAFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.74%	1.30%	+0.44%
Volatility (6M) Calculated over the trailing 6-month period	4.36%	2.66%	+1.70%
Volatility (1Y) Calculated over the trailing 1-year period	5.49%	3.75%	+1.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.83%	5.95%	+2.88%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.82%	277.51%	-267.69%

SSBRX vs. SSAFX - Expense Ratio Comparison

SSBRX has a 0.13% expense ratio, which is higher than SSAFX'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

SSBRX vs. SSAFX - Dividend Comparison

SSBRX's dividend yield for the trailing twelve months is around 5.69%, 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%
SSBRX State Street Target Retirement 2025 Fund	5.69%	6.07%	6.67%	4.60%	6.60%	6.44%	4.74%	6.58%	5.35%	0.60%	1.84%	2.38%

Frequently Asked Questions

Can I hold both SSBRX and SSAFX in my portfolio?

SSBRX and SSAFX have a correlation of 0.52, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SSBRX or SSAFX?

SSBRX has higher volatility (1.74%) compared to SSAFX (1.30%). In terms of maximum drawdown, SSBRX dropped -21.96% vs SSAFX's -18.74%.

Which has better risk-adjusted returns?

SSBRX currently has the higher Sharpe Ratio (2.92 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.