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State Street Aggregate Bond Index Fund Class K (SS...
Performance
Return for Risk
Dividends
Drawdowns
Volatility

Fund Info

CUSIP
85749T871
Distribution Policy
Distributing
Asset Class
Bond

Share Price Chart


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Performance

Performance Chart

The chart shows the growth of an initial investment of $10,000 in State Street Aggregate Bond Index Fund Class K, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends.


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S&P 500 Index

Returns By Period

State Street Aggregate Bond Index Fund Class K (SSFEX) has returned -0.17% so far this year and 4.12% over the past 12 months. Over the last ten years, SSFEX has returned -19.27% per year, falling short of the S&P 500 Index benchmark, which averaged 12.16% annually.


State Street Aggregate Bond Index Fund Class K

1D
0.53%
1M
-1.96%
YTD
-0.17%
6M
0.82%
1Y
4.12%
3Y*
3.42%
5Y*
0.17%
10Y*
-19.27%

Benchmark (S&P 500 Index)

1D
2.91%
1M
-5.09%
YTD
-4.63%
6M
-2.39%
1Y
16.33%
3Y*
16.69%
5Y*
10.18%
10Y*
12.16%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Monthly Returns

Based on dividend-adjusted daily data since Sep 22, 2014, SSFEX's average daily return is -0.02%, while the average monthly return is -0.49%.

Historically, 55% of months were positive and 45% were negative. The best month was Nov 2023 with a return of +4.5%, while the worst month was Apr 2020 at -89.8%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 6 months.

On a daily basis, SSFEX closed higher 47% of trading days. The best single day was Apr 21, 2020 with a return of +32.6%, while the worst single day was Apr 17, 2020 at -90.0%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.19%1.63%-1.96%-0.17%
20250.50%1.86%0.04%0.38%-0.70%1.54%-0.26%1.18%1.10%0.61%0.63%-0.25%6.80%
2024-0.20%-1.43%0.87%-2.48%1.71%0.95%2.33%1.43%1.36%-2.48%1.12%-1.68%1.35%
20233.24%-2.60%2.58%0.59%-1.09%-0.34%-0.06%-0.66%-2.53%-1.58%4.50%3.74%5.61%
2022-2.17%-1.14%-2.79%-3.85%0.76%-1.54%2.51%-2.87%-4.36%-1.31%3.70%-0.68%-13.19%
2021-0.76%-1.50%-1.29%0.78%0.32%0.69%1.12%-0.20%-0.88%-0.06%0.29%-0.26%-1.78%

Benchmark Metrics

State Street Aggregate Bond Index Fund Class K has an annualized alpha of -4.00%, beta of -0.08, and R² of 0.00 versus S&P 500 Index. Calculated based on daily prices since September 23, 2014.

  • This fund participated in 13.78% of S&P 500 Index downside but only -46.31% of its upside — more exposed to losses than it benefited from rallies.
  • Beta of -0.08 may look defensive, but with R² of 0.00 this fund is largely uncorrelated with S&P 500 Index — low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
  • R² of 0.00 means this fund moves largely independently of S&P 500 Index — capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

Alpha
-4.00%
Beta
-0.08
0.00
Upside Capture
-46.31%
Downside Capture
13.78%

Expense Ratio

SSFEX has an expense ratio of 0.03%, which is considered low.


Return for Risk

Risk / Return Rank

SSFEX ranks 56 for risk / return — on par with similar mutual funds. You're getting a typical balance of risk and reward. Not a standout, but not a red flag either — a reasonable choice if other factors align with your goals.


SSFEX Risk / Return Rank: 5656
Overall Rank
SSFEX Sharpe Ratio Rank: 5454
Sharpe Ratio Rank
SSFEX Sortino Ratio Rank: 5353
Sortino Ratio Rank
SSFEX Omega Ratio Rank: 3838
Omega Ratio Rank
SSFEX Calmar Ratio Rank: 8080
Calmar Ratio Rank
SSFEX Martin Ratio Rank: 5656
Martin Ratio Rank
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.

Return / Risk — by metrics

The table below present risk-adjusted performance metrics for State Street Aggregate Bond Index Fund Class K (SSFEX) and compare them to a chosen benchmark (S&P 500 Index).


SSFEXBenchmarkDifference

Sharpe ratio

Return per unit of total volatility

1.04

0.90

+0.14

Sortino ratio

Return per unit of downside risk

1.49

1.39

+0.11

Omega ratio

Gain probability vs. loss probability

1.18

1.21

-0.03

Calmar ratio

Return relative to maximum drawdown

1.96

1.40

+0.56

Martin ratio

Return relative to average drawdown

5.43

6.61

-1.18

Explore SSFEX risk-adjusted metrics in detail

Dive deeper into individual metrics with historical trends, benchmark comparisons, and performance across different time periods.

Dividends

Dividend History

State Street Aggregate Bond Index Fund Class K provided a 4.04% dividend yield over the last twelve months, with an annual payout of $3.49 per share. The fund has been increasing its distributions for 3 consecutive years.


2.00%4.00%6.00%8.00%10.00%$0.00$10.00$20.00$30.00$40.00$50.0020152016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM20252024202320222021202020192018201720162015
Dividend$3.49$3.19$3.18$2.73$2.10$3.32$10.08$35.92$26.60$23.89$21.39$45.50

Dividend yield

4.04%3.66%3.76%3.14%2.48%3.32%9.59%3.56%2.79%2.43%2.19%4.67%

Monthly Dividends

The table displays the monthly dividend distributions for State Street Aggregate Bond Index Fund Class K. The dividends shown in the table have been adjusted to account for any splits that may have occurred.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2026$0.00$0.29$0.28$0.58
2025$0.00$0.00$0.27$0.29$0.28$0.28$0.28$0.29$0.26$0.28$0.29$0.66$3.19
2024$0.00$0.25$0.25$0.24$0.26$0.27$0.26$0.27$0.27$0.26$0.27$0.59$3.18
2023$0.00$0.20$0.20$0.21$0.22$0.22$0.22$0.24$0.23$0.23$0.24$0.51$2.73
2022$0.00$0.15$0.15$0.16$0.16$0.18$0.18$0.18$0.18$0.18$0.18$0.40$2.10
2021$0.00$0.16$0.18$0.16$0.16$0.16$0.15$0.15$0.15$0.15$0.16$1.74$3.32

Drawdowns

Drawdowns Chart

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.


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Worst Drawdowns

The table below displays the maximum drawdowns of the State Street Aggregate Bond Index Fund Class K. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the State Street Aggregate Bond Index Fund Class K was 92.70%, occurring on Apr 20, 2020. The portfolio has not yet recovered.

The current State Street Aggregate Bond Index Fund Class K drawdown is 90.11%.


Depth

Start

To Bottom

Bottom

To Recover

End

Total

-92.7%Mar 10, 202029Apr 20, 2020
-4.51%Jul 11, 2016113Dec 16, 2016179Sep 5, 2017292
-3.53%Sep 6, 2017176May 17, 2018158Jan 3, 2019334
-2.82%Apr 20, 201549Jun 26, 2015154Feb 5, 2016203
-2.05%Sep 5, 20197Sep 13, 201915Oct 4, 201922

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


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