IBTQ vs. SPTL
IBTQ (iShares iBonds Dec 2035 Term Treasury ETF) and SPTL (SPDR Portfolio Long Term Treasury ETF) are both Government Bonds funds - IBTQ tracks the ICE 2035 Maturity US Treasury Index while SPTL tracks the Bloomberg Long U.S. Treasury Index. Both are passively managed. Over the past year, IBTQ returned 3.71% vs 3.88% for SPTL. Their correlation of 0.93 suggests significant overlap in exposure. IBTQ charges 0.07%/yr vs 0.03%/yr for SPTL.
Performance
IBTQ vs. SPTL - Performance Comparison
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Returns By Period
In the year-to-date period, IBTQ achieves a -0.52% return, which is significantly lower than SPTL's -0.19% return.
IBTQ
- 1D
- 0.16%
- 1M
- -0.07%
- YTD
- -0.52%
- 6M
- -0.70%
- 1Y
- 3.71%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
SPTL
- 1D
- 0.19%
- 1M
- 0.43%
- YTD
- -0.19%
- 6M
- -1.00%
- 1Y
- 3.88%
- 3Y*
- -0.59%
- 5Y*
- -5.28%
- 10Y*
- -1.04%
IBTQ vs. SPTL - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
IBTQ iShares iBonds Dec 2035 Term Treasury ETF | -0.52% | 5.09% |
SPTL SPDR Portfolio Long Term Treasury ETF | -0.19% | 2.33% |
Correlation
The correlation between IBTQ and SPTL is 0.94, 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 | 0.94 |
Correlation (All Time) Calculated using the full available price history since Mar 27, 2025 | 0.93 |
The correlation between IBTQ and SPTL has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.
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Return for Risk
IBTQ vs. SPTL — Risk / Return Rank
IBTQ
SPTL
IBTQ vs. SPTL - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2035 Term Treasury ETF (IBTQ) and SPDR Portfolio Long Term Treasury ETF (SPTL). 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.
| IBTQ | SPTL | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.31 | ||
| Sortino ratioReturn per unit of downside risk | +0.43 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 1.08 | +0.05 |
| Calmar ratioReturn relative to maximum drawdown | 0.87 | 0.55 | +0.32 |
| Martin ratioReturn relative to average drawdown | 2.60 | 1.44 | +1.16 |
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
| IBTQ | SPTL | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.75 | 0.44 | +0.31 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | — | -0.36 | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | -0.07 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.68 | 0.24 | +0.44 |
Drawdowns
IBTQ vs. SPTL - Drawdown Comparison
The maximum IBTQ drawdown since its inception was -4.27%, smaller than the maximum SPTL drawdown of -46.20%. Use the drawdown chart below to compare losses from any high point for IBTQ and SPTL.
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Drawdown Indicators
| IBTQ | SPTL | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -4.27% | -46.20% | +41.93% |
Max Drawdown (1Y)Largest decline over 1 year | -4.27% | -7.04% | +2.77% |
Max Drawdown (3Y)Largest decline over 3 years | — | -17.55% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -41.02% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -46.20% | — |
Current DrawdownCurrent decline from peak | -2.76% | -36.75% | +33.99% |
Average DrawdownAverage peak-to-trough decline | -1.41% | -14.25% | +12.84% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.44% | 2.70% | -1.26% |
Volatility
IBTQ vs. SPTL - Volatility Comparison
The current volatility for iShares iBonds Dec 2035 Term Treasury ETF (IBTQ) is 1.60%, while SPDR Portfolio Long Term Treasury ETF (SPTL) has a volatility of 2.60%. This indicates that IBTQ experiences smaller price fluctuations and is considered to be less risky than SPTL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBTQ | SPTL | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.60% | 2.60% | -1.00% |
Volatility (6M)Calculated over the trailing 6-month period | 3.47% | 5.97% | -2.50% |
Volatility (1Y)Calculated over the trailing 1-year period | 5.02% | 8.92% | -3.90% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.61% | 14.61% | -9.00% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.61% | 13.94% | -8.33% |
IBTQ vs. SPTL - Expense Ratio Comparison
IBTQ has a 0.07% expense ratio, which is higher than SPTL'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
IBTQ vs. SPTL - Dividend Comparison
IBTQ's dividend yield for the trailing twelve months is around 3.72%, less than SPTL's 4.21% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IBTQ iShares iBonds Dec 2035 Term Treasury ETF | 3.72% | 2.80% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
SPTL SPDR Portfolio Long Term Treasury ETF | 4.21% | 4.12% | 4.03% | 3.24% | 2.75% | 1.68% | 1.71% | 2.45% | 2.69% | 2.53% | 2.56% | 2.60% |
Frequently Asked Questions
With a correlation of 0.94, IBTQ and SPTL 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.
SPTL has higher volatility (2.60%) compared to IBTQ (1.60%). In terms of maximum drawdown, IBTQ dropped -4.27% vs SPTL's -46.20%.
On 1-year performance, SPTL leads with 3.88% vs 3.71% for IBTQ. On fees, SPTL is cheaper at 0.03% per year. On volatility, IBTQ has been the lower-risk option at 1.60%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, SPTL has performed better with a 3.88% return vs 3.71%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
SPTL is cheaper with a 0.03% expense ratio, compared with 0.07% for IBTQ.
SPTL has the higher dividend yield at 4.21%, compared with 3.72% for IBTQ.
IBTQ tracks ICE 2035 Maturity US Treasury Index, while SPTL tracks Bloomberg Long U.S. Treasury Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.07% for IBTQ and 0.03% for SPTL.
IBTQ currently has the higher Sharpe Ratio (0.75 vs 0.44), 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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