FBLTX vs. FTLTX
FBLTX (Fidelity SAI Long-Term Treasury Bond Index Fund) and FTLTX (Fidelity Series Long-Term Treasury Bond Index Fund) are both Government Bonds funds from Fidelity. Over the past 5 years, FBLTX returned -8.31%/yr vs -7.09%/yr for FTLTX. Their 0.99 correlation means they have historically moved very closely together. FBLTX charges 0.03%/yr vs 0.00%/yr for FTLTX.
Performance
FBLTX vs. FTLTX - Performance Comparison
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Returns By Period
In the year-to-date period, FBLTX achieves a -3.37% return, which is significantly lower than FTLTX's -2.95% return.
FBLTX
- 1D
- -0.16%
- 1M
- -3.63%
- 6M
- -3.28%
- YTD
- -3.37%
- 1Y
- -2.17%
- 3Y*
- -2.29%
- 5Y*
- -8.31%
- 10Y*
- -2.52%
- ALL TIME*
- -1.05%
FTLTX
- 1D
- 0.00%
- 1M
- -3.21%
- 6M
- -2.73%
- YTD
- -2.95%
- 1Y
- -1.20%
- 3Y*
- -0.91%
- 5Y*
- -7.09%
- 10Y*
- —
- ALL TIME*
- -0.62%
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 |
FBLTX vs. FTLTX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FBLTX Fidelity SAI Long-Term Treasury Bond Index Fund | -3.37% | 4.39% | -8.05% | 2.71% | -31.84% | -4.89% | 18.27% | 14.36% | -1.24% | 9.06% |
FTLTX Fidelity Series Long-Term Treasury Bond Index Fund | -2.95% | 5.45% | -6.13% | 3.27% | -29.89% | -5.13% | 17.45% | 14.23% | -1.63% | 8.22% |
Correlation
The correlation between FBLTX and FTLTX is 0.97 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.97 |
Correlation (3Y) Balances recent behavior with more history. | 0.98 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.99 |
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017 | 0.99 |
The correlation between FBLTX and FTLTX has been stable across timeframes, ranging from 0.97 to 0.99 - a consistent structural relationship.
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Return for Risk
FBLTX vs. FTLTX — Risk / Return Rank
FBLTX
FTLTX
FBLTX vs. FTLTX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) and Fidelity Series Long-Term Treasury Bond Index Fund (FTLTX). 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.
| FBLTX | FTLTX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.09 | ||
| Sortino ratioReturn per unit of downside risk | -0.12 | ||
| Omega ratioGain probability vs. loss probability | 1.00 | 1.02 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | -0.05 | 0.06 | -0.11 |
| Martin ratioReturn relative to average drawdown | -0.10 | 0.14 | -0.24 |
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Drawdowns
FBLTX vs. FTLTX - Drawdown Comparison
The maximum FBLTX drawdown since its inception was -49.06%, roughly equal to the maximum FTLTX drawdown of -46.86%. Use the drawdown chart below to compare losses from any high point for FBLTX and FTLTX.
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Drawdown Indicators
| FBLTX | FTLTX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -49.06% | -46.86% | -2.20% |
Max Drawdown (1Y)Largest decline over 1 year | -7.66% | -7.10% | -0.56% |
Max Drawdown (3Y)Largest decline over 3 years | -14.75% | -13.45% | -1.30% |
Max Drawdown (5Y)Largest decline over 5 years | -44.19% | -41.52% | -2.67% |
Max Drawdown (10Y)Largest decline over 10 years | -49.06% | — | — |
Current DrawdownCurrent decline from peak | -42.95% | -38.91% | -4.04% |
Average DrawdownAverage peak-to-trough decline | -21.28% | -20.27% | -1.01% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.54% | 3.22% | +0.32% |
Volatility
FBLTX vs. FTLTX - Volatility Comparison
Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) has a higher volatility of 2.48% compared to Fidelity Series Long-Term Treasury Bond Index Fund (FTLTX) at 2.31%. This indicates that FBLTX's price experiences larger fluctuations and is considered to be riskier than FTLTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FBLTX | FTLTX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.48% | 2.31% | +0.17% |
Volatility (6M)Calculated over the trailing 6-month period | 6.79% | 6.24% | +0.55% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.26% | 8.40% | +0.86% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.57% | 14.46% | +1.11% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.51% | 13.79% | +0.72% |
FBLTX vs. FTLTX - Expense Ratio Comparison
FBLTX has a 0.03% expense ratio, which is higher than FTLTX's 0.00% 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
FBLTX vs. FTLTX - Dividend Comparison
FBLTX's dividend yield for the trailing twelve months is around 3.97%, more than FTLTX's 3.74% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FBLTX Fidelity SAI Long-Term Treasury Bond Index Fund | 3.97% | 4.04% | 3.60% | 3.29% | 2.25% | 1.81% | 6.73% | 2.39% | 2.87% | 2.68% | 3.70% | 0.39% |
FTLTX Fidelity Series Long-Term Treasury Bond Index Fund | 3.74% | 3.83% | 3.71% | 3.17% | 2.20% | 2.06% | 12.95% | 10.68% | 2.89% | 2.44% | 0.00% | 0.00% |
Frequently Asked Questions
With a correlation of 0.97, FBLTX and FTLTX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
FBLTX has higher volatility (2.48%) compared to FTLTX (2.31%). In terms of maximum drawdown, FBLTX dropped -49.06% vs FTLTX's -46.86%.
FTLTX currently has the higher Sharpe Ratio (0.05 vs -0.04), 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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