IBGK vs. SPTL
IBGK (iShares iBonds Dec 2054 Term Treasury ETF) and SPTL (SPDR Portfolio Long Term Treasury ETF) are both exchange-traded funds - IBGK is a Long-Term Bond fund tracking the ICE 2054 Maturity US Treasury Index, while SPTL is a Government Bonds fund tracking the Bloomberg Long U.S. Treasury Index. Both are passively managed. Over the past year, IBGK returned 4.74% vs 5.22% for SPTL. With a 0.99 correlation, they move nearly in lockstep. IBGK charges 0.07%/yr vs 0.03%/yr for SPTL.
Performance
IBGK vs. SPTL - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, IBGK achieves a -0.36% return, which is significantly higher than SPTL's -0.38% return.
IBGK
- 1D
- -0.34%
- 1M
- 0.75%
- YTD
- -0.36%
- 6M
- -1.89%
- 1Y
- 4.74%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
SPTL
- 1D
- -0.38%
- 1M
- 0.71%
- YTD
- -0.38%
- 6M
- -1.67%
- 1Y
- 5.22%
- 3Y*
- -0.70%
- 5Y*
- -5.32%
- 10Y*
- -1.12%
IBGK vs. SPTL - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | |
|---|---|---|---|
IBGK iShares iBonds Dec 2054 Term Treasury ETF | -0.36% | 3.66% | -2.73% |
SPTL SPDR Portfolio Long Term Treasury ETF | -0.38% | 5.28% | -2.29% |
Correlation
The correlation between IBGK and SPTL is 0.99 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Jun 13, 2024 | 0.99 |
The correlation between IBGK and SPTL has been stable across timeframes, ranging from 0.99 to 0.99 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
IBGK vs. SPTL — Risk / Return Rank
IBGK
SPTL
IBGK vs. SPTL - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2054 Term Treasury ETF (IBGK) 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.
| IBGK | SPTL | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.08 | ||
| Sortino ratioReturn per unit of downside risk | -0.10 | ||
| Omega ratioGain probability vs. loss probability | 1.09 | 1.10 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 0.65 | 0.74 | -0.09 |
| Martin ratioReturn relative to average drawdown | 1.63 | 1.94 | -0.31 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading charts...
Sharpe Ratios by Period
| IBGK | SPTL | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.51 | 0.59 | -0.08 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | — | -0.37 | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | -0.08 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.02 | 0.24 | -0.22 |
Drawdowns
IBGK vs. SPTL - Drawdown Comparison
The maximum IBGK drawdown since its inception was -14.62%, smaller than the maximum SPTL drawdown of -46.20%. Use the drawdown chart below to compare losses from any high point for IBGK and SPTL.
Loading charts...
Drawdown Indicators
| IBGK | SPTL | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -14.62% | -46.20% | +31.58% |
Max Drawdown (1Y)Largest decline over 1 year | -7.29% | -7.04% | -0.25% |
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 | -9.19% | -36.87% | +27.68% |
Average DrawdownAverage peak-to-trough decline | -8.06% | -14.24% | +6.18% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.92% | 2.69% | +0.23% |
Volatility
IBGK vs. SPTL - Volatility Comparison
iShares iBonds Dec 2054 Term Treasury ETF (IBGK) and SPDR Portfolio Long Term Treasury ETF (SPTL) have volatilities of 2.70% and 2.63%, 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.
Loading charts...
Volatility by Period
| IBGK | SPTL | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.70% | 2.63% | +0.07% |
Volatility (6M)Calculated over the trailing 6-month period | 6.20% | 5.97% | +0.23% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.36% | 8.92% | +0.44% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 11.81% | 14.63% | -2.82% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 11.81% | 13.95% | -2.14% |
IBGK vs. SPTL - Expense Ratio Comparison
IBGK 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
IBGK vs. SPTL - Dividend Comparison
IBGK's dividend yield for the trailing twelve months is around 4.72%, more than SPTL's 4.21% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IBGK iShares iBonds Dec 2054 Term Treasury ETF | 4.72% | 4.59% | 3.15% | 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 0.99, IBGK 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.
IBGK has higher volatility (2.70%) compared to SPTL (2.63%). In terms of maximum drawdown, IBGK dropped -14.62% vs SPTL's -46.20%.
On 1-year performance, SPTL leads with 5.22% vs 4.74% for IBGK. On fees, SPTL 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, SPTL has performed better with a 5.22% return vs 4.74%. 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 IBGK.
IBGK has the higher dividend yield at 4.72%, compared with 4.21% for SPTL.
IBGK is categorized as Long-Term Bond, while SPTL is Government Bonds. IBGK tracks ICE 2054 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 IBGK and 0.03% for SPTL.
SPTL currently has the higher Sharpe Ratio (0.59 vs 0.51), 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.
Find the right allocation for IBGK and SPTL
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer