IBDZ vs. SPBO
IBDZ (iShares iBonds Dec 2034 Term Corporate ETF) and SPBO (SPDR Portfolio Corporate Bond ETF) are both Corporate Bonds funds - IBDZ tracks the iBonds Dec 2034 Term Corporate Index while SPBO tracks the Bloomberg Barclays U.S. Corporate Bond Index. Both are passively managed. Over the past year, IBDZ returned 6.65% vs 6.29% for SPBO. Their correlation of 0.91 suggests significant overlap in exposure. IBDZ charges 0.10%/yr vs 0.03%/yr for SPBO.
Performance
IBDZ vs. SPBO - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, IBDZ achieves a 0.34% return, which is significantly lower than SPBO's 0.70% return.
IBDZ
- 1D
- -0.19%
- 1M
- 0.37%
- YTD
- 0.34%
- 6M
- 0.33%
- 1Y
- 6.65%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
SPBO
- 1D
- -0.21%
- 1M
- 0.67%
- YTD
- 0.70%
- 6M
- 0.47%
- 1Y
- 6.29%
- 3Y*
- 5.54%
- 5Y*
- 0.66%
- 10Y*
- 2.77%
IBDZ vs. SPBO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | |
|---|---|---|---|
IBDZ iShares iBonds Dec 2034 Term Corporate ETF | 0.34% | 8.84% | 4.23% |
SPBO SPDR Portfolio Corporate Bond ETF | 0.70% | 7.83% | 3.41% |
Correlation
The correlation between IBDZ and SPBO 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 May 28, 2024 | 0.91 |
The correlation between IBDZ and SPBO has been stable across timeframes, ranging from 0.91 to 0.94 - 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
IBDZ vs. SPBO — Risk / Return Rank
IBDZ
SPBO
IBDZ vs. SPBO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2034 Term Corporate ETF (IBDZ) and SPDR Portfolio Corporate Bond ETF (SPBO). 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.
| IBDZ | SPBO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.04 | ||
| Sortino ratioReturn per unit of downside risk | -0.03 | ||
| Omega ratioGain probability vs. loss probability | 1.24 | 1.26 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 2.19 | 2.20 | -0.01 |
| Martin ratioReturn relative to average drawdown | 7.12 | 6.94 | +0.18 |
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
| IBDZ | SPBO | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.41 | 1.45 | -0.04 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | — | 0.09 | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.37 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 1.06 | 0.47 | +0.59 |
Drawdowns
IBDZ vs. SPBO - Drawdown Comparison
The maximum IBDZ drawdown since its inception was -5.57%, smaller than the maximum SPBO drawdown of -22.23%. Use the drawdown chart below to compare losses from any high point for IBDZ and SPBO.
Loading charts...
Drawdown Indicators
| IBDZ | SPBO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -5.57% | -22.23% | +16.66% |
Max Drawdown (1Y)Largest decline over 1 year | -3.04% | -2.87% | -0.17% |
Max Drawdown (3Y)Largest decline over 3 years | — | -6.41% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -22.23% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -22.23% | — |
Current DrawdownCurrent decline from peak | -1.26% | -0.91% | -0.35% |
Average DrawdownAverage peak-to-trough decline | -1.28% | -4.04% | +2.76% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.94% | 0.91% | +0.03% |
Volatility
IBDZ vs. SPBO - Volatility Comparison
iShares iBonds Dec 2034 Term Corporate ETF (IBDZ) has a higher volatility of 1.43% compared to SPDR Portfolio Corporate Bond ETF (SPBO) at 1.35%. This indicates that IBDZ's price experiences larger fluctuations and is considered to be riskier than SPBO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| IBDZ | SPBO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.43% | 1.35% | +0.08% |
Volatility (6M)Calculated over the trailing 6-month period | 3.32% | 3.21% | +0.11% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.74% | 4.36% | +0.38% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.27% | 7.18% | -0.91% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 6.27% | 7.49% | -1.22% |
IBDZ vs. SPBO - Expense Ratio Comparison
IBDZ has a 0.10% expense ratio, which is higher than SPBO'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
IBDZ vs. SPBO - Dividend Comparison
IBDZ's dividend yield for the trailing twelve months is around 4.86%, less than SPBO's 5.12% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IBDZ iShares iBonds Dec 2034 Term Corporate ETF | 4.86% | 4.85% | 2.50% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
SPBO SPDR Portfolio Corporate Bond ETF | 5.12% | 5.09% | 5.28% | 4.73% | 3.54% | 2.42% | 2.75% | 3.46% | 3.60% | 3.15% | 3.35% | 3.07% |
Frequently Asked Questions
With a correlation of 0.94, IBDZ and SPBO 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.
IBDZ has higher volatility (1.43%) compared to SPBO (1.35%). In terms of maximum drawdown, IBDZ dropped -5.57% vs SPBO's -22.23%.
On 1-year performance, IBDZ leads with 6.65% vs 6.29% for SPBO. On fees, SPBO 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, IBDZ has performed better with a 6.65% return vs 6.29%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
SPBO is cheaper with a 0.03% expense ratio, compared with 0.10% for IBDZ.
SPBO has the higher dividend yield at 5.12%, compared with 4.86% for IBDZ.
IBDZ tracks iBonds Dec 2034 Term Corporate Index, while SPBO tracks Bloomberg Barclays U.S. Corporate Bond Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.10% for IBDZ and 0.03% for SPBO.
SPBO currently has the higher Sharpe Ratio (1.45 vs 1.41), 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 IBDZ and SPBO
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