SSFDX vs. FIPDX
SSFDX (State Street Aggregate Bond Index Fund) and FIPDX (Fidelity Inflation-Protected Bond Index Fund) are both mutual funds - SSFDX is a Intermediate Core Bond fund managed by State Street, while FIPDX is a Inflation-Protected Bonds fund tracking the Bloomberg US Treasury Inflation-Protected Securities Index. Over the past 10 years, SSFDX returned 1.24%/yr vs 2.41%/yr for FIPDX. Their 0.78 correlation means they have sometimes moved together and sometimes differently. SSFDX charges 0.23%/yr vs 0.05%/yr for FIPDX.
Performance
SSFDX vs. FIPDX - Performance Comparison
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Returns By Period
In the year-to-date period, SSFDX achieves a -0.34% return, which is significantly lower than FIPDX's 0.55% return. Over the past 10 years, SSFDX has underperformed FIPDX with an annualized return of 1.24%, while FIPDX has yielded a comparatively higher 2.41% annualized return.
SSFDX
- 1D
- 0.06%
- 1M
- -0.87%
- 6M
- -0.53%
- YTD
- -0.34%
- 1Y
- 2.14%
- 3Y*
- 3.65%
- 5Y*
- -0.54%
- 10Y*
- 1.24%
- ALL TIME*
- 1.72%
FIPDX
- 1D
- -0.11%
- 1M
- -0.44%
- 6M
- 0.11%
- YTD
- 0.55%
- 1Y
- 2.01%
- 3Y*
- 3.66%
- 5Y*
- 0.31%
- 10Y*
- 2.41%
- ALL TIME*
- 2.16%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
SSFDX vs. FIPDX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SSFDX State Street Aggregate Bond Index Fund | -0.34% | 6.80% | 1.36% | 5.39% | -13.36% | -1.98% | 7.57% | 8.98% | -0.20% | 3.29% |
FIPDX Fidelity Inflation-Protected Bond Index Fund | 0.55% | 6.90% | 2.00% | 3.77% | -12.09% | 5.94% | 10.90% | 8.32% | -1.37% | 2.98% |
Correlation
The correlation between SSFDX and FIPDX is 0.80, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.80 |
Correlation (3Y) Balances recent behavior with more history. | 0.86 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.81 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.78 |
Correlation (All Time) Calculated using the full available price history since Sep 22, 2014 | 0.78 |
The correlation between SSFDX and FIPDX has been stable across timeframes, ranging from 0.78 to 0.86 - a consistent structural relationship.
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Return for Risk
SSFDX vs. FIPDX — Risk / Return Rank
SSFDX
FIPDX
SSFDX vs. FIPDX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for State Street Aggregate Bond Index Fund (SSFDX) and Fidelity Inflation-Protected Bond Index Fund (FIPDX). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| SSFDX | FIPDX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.08 | ||
| Sortino ratioReturn per unit of downside risk | +0.12 | ||
| Omega ratioGain probability vs. loss probability | 1.14 | 1.13 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.10 | 1.27 | -0.17 |
| Martin ratioReturn relative to average drawdown | 2.76 | 3.38 | -0.62 |
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Drawdowns
SSFDX vs. FIPDX - Drawdown Comparison
The maximum SSFDX drawdown since its inception was -26.93%, which is greater than FIPDX's maximum drawdown of -14.32%. Use the drawdown chart below to compare losses from any high point for SSFDX and FIPDX.
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Drawdown Indicators
| SSFDX | FIPDX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -26.93% | -14.32% | -12.61% |
Max Drawdown (1Y)Largest decline over 1 year | -2.75% | -1.94% | -0.81% |
Max Drawdown (3Y)Largest decline over 3 years | -5.00% | -3.95% | -1.05% |
Max Drawdown (5Y)Largest decline over 5 years | -18.18% | -14.32% | -3.86% |
Max Drawdown (10Y)Largest decline over 10 years | -26.93% | -14.32% | -12.61% |
Current DrawdownCurrent decline from peak | -3.98% | -1.19% | -2.79% |
Average DrawdownAverage peak-to-trough decline | -4.65% | -4.43% | -0.22% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.09% | 0.73% | +0.36% |
Volatility
SSFDX vs. FIPDX - Volatility Comparison
State Street Aggregate Bond Index Fund (SSFDX) has a higher volatility of 0.97% compared to Fidelity Inflation-Protected Bond Index Fund (FIPDX) at 0.76%. This indicates that SSFDX's price experiences larger fluctuations and is considered to be riskier than FIPDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SSFDX | FIPDX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.97% | 0.76% | +0.21% |
Volatility (6M)Calculated over the trailing 6-month period | 2.87% | 2.49% | +0.38% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.67% | 3.33% | +0.34% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.93% | 5.96% | -0.03% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.11% | 5.36% | +8.75% |
SSFDX vs. FIPDX - Expense Ratio Comparison
SSFDX has a 0.23% expense ratio, which is higher than FIPDX's 0.05% 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
SSFDX vs. FIPDX - Dividend Comparison
SSFDX's dividend yield for the trailing twelve months is around 4.15%, less than FIPDX's 4.36% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FIPDX Fidelity Inflation-Protected Bond Index Fund | 4.36% | 4.18% | 3.75% | 3.56% | 8.87% | 4.76% | 1.24% | 1.97% | 2.26% | 1.29% | 1.34% | 0.38% |
SSFDX State Street Aggregate Bond Index Fund | 4.15% | 3.64% | 3.59% | 2.95% | 2.27% | 3.12% | 3.00% | 3.15% | 2.79% | 2.43% | 2.19% | 4.63% |
Frequently Asked Questions
SSFDX and FIPDX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
SSFDX has higher volatility (0.97%) compared to FIPDX (0.76%). In terms of maximum drawdown, SSFDX dropped -26.93% vs FIPDX's -14.32%.
SSFDX currently has the higher Sharpe Ratio (0.82 vs 0.74), 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.
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