FNSOX vs. SSFEX
Compare and contrast key facts about Fidelity Short-Term Bond Index Fund (FNSOX) and State Street Aggregate Bond Index Fund Class K (SSFEX).
FNSOX is managed by Fidelity. It was launched on Oct 18, 2017. SSFEX is managed by State Street.
Performance
FNSOX vs. SSFEX - Performance Comparison
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FNSOX vs. SSFEX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FNSOX Fidelity Short-Term Bond Index Fund | -0.22% | 6.01% | 3.90% | 4.90% | -5.76% | -1.25% | 4.28% | 4.95% | 1.14% | -0.22% |
SSFEX State Street Aggregate Bond Index Fund Class K | -0.17% | 6.80% | 1.35% | 5.61% | -13.19% | -1.78% | -89.22% | 9.45% | -0.10% | 0.31% |
Returns By Period
In the year-to-date period, FNSOX achieves a -0.22% return, which is significantly lower than SSFEX's -0.17% return.
FNSOX
- 1D
- 0.20%
- 1M
- -1.18%
- YTD
- -0.22%
- 6M
- 0.91%
- 1Y
- 3.69%
- 3Y*
- 4.22%
- 5Y*
- 1.56%
- 10Y*
- —
SSFEX
- 1D
- 0.53%
- 1M
- -1.96%
- YTD
- -0.17%
- 6M
- 0.82%
- 1Y
- 4.12%
- 3Y*
- 3.42%
- 5Y*
- 0.17%
- 10Y*
- -19.27%
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FNSOX vs. SSFEX - Expense Ratio Comparison
Both FNSOX and SSFEX have an expense ratio of 0.03%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.
Return for Risk
FNSOX vs. SSFEX — Risk / Return Rank
FNSOX
SSFEX
FNSOX vs. SSFEX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity Short-Term Bond Index Fund (FNSOX) and State Street Aggregate Bond Index Fund Class K (SSFEX). 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.
| FNSOX | SSFEX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.82 | 1.04 | +0.78 |
Sortino ratioReturn per unit of downside risk | 2.83 | 1.49 | +1.34 |
Omega ratioGain probability vs. loss probability | 1.37 | 1.18 | +0.19 |
Calmar ratioReturn relative to maximum drawdown | 2.86 | 1.96 | +0.90 |
Martin ratioReturn relative to average drawdown | 10.76 | 5.43 | +5.33 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| FNSOX | SSFEX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.82 | 1.04 | +0.78 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.55 | 0.03 | +0.52 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | -0.61 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.83 | -0.56 | +1.39 |
Correlation
The correlation between FNSOX and SSFEX is 0.78, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
FNSOX vs. SSFEX - Dividend Comparison
FNSOX's dividend yield for the trailing twelve months is around 3.15%, less than SSFEX's 4.04% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FNSOX Fidelity Short-Term Bond Index Fund | 3.15% | 3.22% | 2.80% | 1.74% | 0.81% | 0.80% | 1.54% | 2.61% | 2.04% | 0.34% | 0.00% | 0.00% |
SSFEX State Street Aggregate Bond Index Fund Class K | 4.04% | 3.66% | 3.76% | 3.14% | 2.48% | 3.32% | 9.59% | 3.56% | 2.79% | 2.43% | 2.19% | 4.67% |
Drawdowns
FNSOX vs. SSFEX - Drawdown Comparison
The maximum FNSOX drawdown since its inception was -8.92%, smaller than the maximum SSFEX drawdown of -92.70%. Use the drawdown chart below to compare losses from any high point for FNSOX and SSFEX.
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Drawdown Indicators
| FNSOX | SSFEX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -8.92% | -92.70% | +83.78% |
Max Drawdown (1Y)Largest decline over 1 year | -1.47% | -2.52% | +1.05% |
Max Drawdown (5Y)Largest decline over 5 years | -8.77% | -17.99% | +9.22% |
Max Drawdown (10Y)Largest decline over 10 years | — | -92.70% | — |
Current DrawdownCurrent decline from peak | -1.18% | -90.11% | +88.93% |
Average DrawdownAverage peak-to-trough decline | -1.75% | -47.36% | +45.61% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.39% | 0.91% | -0.52% |
Volatility
FNSOX vs. SSFEX - Volatility Comparison
The current volatility for Fidelity Short-Term Bond Index Fund (FNSOX) is 0.78%, while State Street Aggregate Bond Index Fund Class K (SSFEX) has a volatility of 1.61%. This indicates that FNSOX experiences smaller price fluctuations and is considered to be less risky than SSFEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FNSOX | SSFEX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.78% | 1.61% | -0.83% |
Volatility (6M)Calculated over the trailing 6-month period | 1.37% | 2.50% | -1.13% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.21% | 4.20% | -1.99% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 2.86% | 5.91% | -3.05% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 2.48% | 31.83% | -29.35% |