IBTL vs. SPTB
IBTL (iShares iBonds Dec 2031 Term Treasury ETF) and SPTB (State Street SPDR Portfolio Treasury ETF) are both Government Bonds funds - IBTL tracks the ICE 2031 Maturity US Treasury Index while SPTB tracks the Bloomberg U.S. Treasury Index. Both are passively managed. Over the past year, IBTL returned 3.77% vs 3.87% for SPTB. With a 0.96 correlation, they move nearly in lockstep. IBTL charges 0.07%/yr vs 0.03%/yr for SPTB.
Performance
IBTL vs. SPTB - Performance Comparison
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Returns By Period
In the year-to-date period, IBTL achieves a -0.47% return, which is significantly lower than SPTB's -0.07% return.
IBTL
- 1D
- -0.15%
- 1M
- -0.21%
- YTD
- -0.47%
- 6M
- -0.69%
- 1Y
- 3.77%
- 3Y*
- 2.83%
- 5Y*
- —
- 10Y*
- —
SPTB
- 1D
- -0.22%
- 1M
- 0.08%
- YTD
- -0.07%
- 6M
- -0.37%
- 1Y
- 3.87%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
IBTL vs. SPTB - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | |
|---|---|---|---|
IBTL iShares iBonds Dec 2031 Term Treasury ETF | -0.47% | 7.85% | 2.40% |
SPTB State Street SPDR Portfolio Treasury ETF | -0.07% | 6.14% | 2.17% |
Correlation
The correlation between IBTL and SPTB is 0.95, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.95 |
Correlation (All Time) Calculated using the full available price history since May 22, 2024 | 0.96 |
The correlation between IBTL and SPTB has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.
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Return for Risk
IBTL vs. SPTB — Risk / Return Rank
IBTL
SPTB
IBTL vs. SPTB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2031 Term Treasury ETF (IBTL) and State Street SPDR Portfolio Treasury ETF (SPTB). 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.
| IBTL | SPTB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.02 | ||
| Sortino ratioReturn per unit of downside risk | -0.02 | ||
| Omega ratioGain probability vs. loss probability | 1.18 | 1.19 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 1.34 | 1.34 | 0.00 |
| Martin ratioReturn relative to average drawdown | 3.90 | 3.98 | -0.08 |
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
| IBTL | SPTB | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.05 | 1.07 | -0.02 |
Sharpe Ratio (All Time)Calculated using the full available price history | -0.21 | 0.92 | -1.13 |
Drawdowns
IBTL vs. SPTB - Drawdown Comparison
The maximum IBTL drawdown since its inception was -20.93%, which is greater than SPTB's maximum drawdown of -4.96%. Use the drawdown chart below to compare losses from any high point for IBTL and SPTB.
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Drawdown Indicators
| IBTL | SPTB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -20.93% | -4.96% | -15.97% |
Max Drawdown (1Y)Largest decline over 1 year | -2.83% | -2.90% | +0.07% |
Max Drawdown (3Y)Largest decline over 3 years | -7.38% | — | — |
Current DrawdownCurrent decline from peak | -7.25% | -1.94% | -5.31% |
Average DrawdownAverage peak-to-trough decline | -11.47% | -1.32% | -10.15% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.97% | 0.98% | -0.01% |
Volatility
IBTL vs. SPTB - Volatility Comparison
iShares iBonds Dec 2031 Term Treasury ETF (IBTL) and State Street SPDR Portfolio Treasury ETF (SPTB) have volatilities of 1.08% and 1.11%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBTL | SPTB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.08% | 1.11% | -0.03% |
Volatility (6M)Calculated over the trailing 6-month period | 2.39% | 2.47% | -0.08% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.62% | 3.64% | -0.02% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 7.46% | 4.42% | +3.04% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 7.46% | 4.42% | +3.04% |
IBTL vs. SPTB - Expense Ratio Comparison
IBTL has a 0.07% expense ratio, which is higher than SPTB's 0.03% 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
IBTL vs. SPTB - Dividend Comparison
IBTL's dividend yield for the trailing twelve months is around 3.97%, less than SPTB's 4.20% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
IBTL iShares iBonds Dec 2031 Term Treasury ETF | 3.97% | 3.93% | 4.07% | 3.04% | 2.36% | 0.70% |
SPTB State Street SPDR Portfolio Treasury ETF | 4.20% | 4.23% | 2.76% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
With a correlation of 0.95, IBTL and SPTB 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.
SPTB has higher volatility (1.11%) compared to IBTL (1.08%). In terms of maximum drawdown, IBTL dropped -20.93% vs SPTB's -4.96%.
On 1-year performance, SPTB leads with 3.87% vs 3.77% for IBTL. On fees, SPTB is cheaper at 0.03% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, SPTB has performed better with a 3.87% return vs 3.77%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
SPTB is cheaper with a 0.03% expense ratio, compared with 0.07% for IBTL.
SPTB has the higher dividend yield at 4.20%, compared with 3.97% for IBTL.
IBTL tracks ICE 2031 Maturity US Treasury Index, while SPTB tracks Bloomberg U.S. Treasury Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.07% for IBTL and 0.03% for SPTB.
SPTB currently has the higher Sharpe Ratio (1.07 vs 1.05), 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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