IGLB vs. SPLB
IGLB (iShares 10+ Year Investment Grade Corporate Bond ETF) and SPLB (SPDR Portfolio Long Term Corporate Bond ETF) are both Corporate Bonds funds - IGLB tracks the ICE BofAML10+ Year US Corporate Index while SPLB tracks the Bloomberg Barclays Long U.S. Corporate Index. Both are passively managed. Over the past 10 years, IGLB returned 2.20%/yr vs 2.19%/yr for SPLB. Their correlation of 0.88 suggests significant overlap in exposure. IGLB charges 0.06%/yr vs 0.07%/yr for SPLB.
Performance
IGLB vs. SPLB - Performance Comparison
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Returns By Period
In the year-to-date period, IGLB achieves a 1.19% return, which is significantly lower than SPLB's 1.28% return. Both investments have delivered pretty close results over the past 10 years, with IGLB having a 2.20% annualized return and SPLB not far behind at 2.19%.
IGLB
- 1D
- -0.42%
- 1M
- 1.36%
- YTD
- 1.19%
- 6M
- 1.21%
- 1Y
- 6.56%
- 3Y*
- 4.26%
- 5Y*
- -2.01%
- 10Y*
- 2.20%
SPLB
- 1D
- -0.40%
- 1M
- 1.36%
- YTD
- 1.28%
- 6M
- 1.33%
- 1Y
- 6.30%
- 3Y*
- 4.12%
- 5Y*
- -2.19%
- 10Y*
- 2.19%
IGLB vs. SPLB - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IGLB iShares 10+ Year Investment Grade Corporate Bond ETF | 1.19% | 7.53% | -1.50% | 11.03% | -25.38% | -1.68% | 13.30% | 23.19% | -6.90% | 12.15% |
SPLB SPDR Portfolio Long Term Corporate Bond ETF | 1.28% | 7.05% | -1.74% | 11.20% | -25.68% | -1.99% | 13.47% | 23.49% | -7.35% | 12.26% |
Correlation
The correlation between IGLB and SPLB 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 (3Y) Calculated over the trailing 3-year period | 1.00 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.99 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.97 |
Correlation (All Time) Calculated using the full available price history since Dec 9, 2009 | 0.88 |
The correlation between IGLB and SPLB shifts across timeframes, from 0.88 (all time) to 1.00 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
IGLB vs. SPLB — Risk / Return Rank
IGLB
SPLB
IGLB vs. SPLB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares 10+ Year Investment Grade Corporate Bond ETF (IGLB) and SPDR Portfolio Long Term Corporate Bond ETF (SPLB). 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.
| IGLB | SPLB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.05 | ||
| Sortino ratioReturn per unit of downside risk | +0.08 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.14 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.27 | 1.17 | +0.10 |
| Martin ratioReturn relative to average drawdown | 3.13 | 2.84 | +0.29 |
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Drawdowns
IGLB vs. SPLB - Drawdown Comparison
The maximum IGLB drawdown since its inception was -34.12%, roughly equal to the maximum SPLB drawdown of -34.46%. Use the drawdown chart below to compare losses from any high point for IGLB and SPLB.
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Drawdown Indicators
| IGLB | SPLB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -34.12% | -34.46% | +0.34% |
Max Drawdown (1Y)Largest decline over 1 year | -5.19% | -5.42% | +0.23% |
Max Drawdown (3Y)Largest decline over 3 years | -12.87% | -12.91% | +0.04% |
Max Drawdown (5Y)Largest decline over 5 years | -34.12% | -34.46% | +0.34% |
Max Drawdown (10Y)Largest decline over 10 years | -34.12% | -34.46% | +0.34% |
Current DrawdownCurrent decline from peak | -13.41% | -14.23% | +0.82% |
Average DrawdownAverage peak-to-trough decline | -8.12% | -8.02% | -0.10% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.10% | 2.22% | -0.12% |
Volatility
IGLB vs. SPLB - Volatility Comparison
iShares 10+ Year Investment Grade Corporate Bond ETF (IGLB) and SPDR Portfolio Long Term Corporate Bond ETF (SPLB) have volatilities of 1.89% and 1.94%, 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
| IGLB | SPLB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.89% | 1.94% | -0.05% |
Volatility (6M)Calculated over the trailing 6-month period | 5.80% | 5.92% | -0.12% |
Volatility (1Y)Calculated over the trailing 1-year period | 7.76% | 7.96% | -0.20% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 12.38% | 12.69% | -0.31% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 12.55% | 12.96% | -0.41% |
IGLB vs. SPLB - Expense Ratio Comparison
IGLB has a 0.06% expense ratio, which is lower than SPLB's 0.07% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
IGLB vs. SPLB - Dividend Comparison
IGLB's dividend yield for the trailing twelve months is around 5.24%, less than SPLB's 5.36% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IGLB iShares 10+ Year Investment Grade Corporate Bond ETF | 5.24% | 5.14% | 5.10% | 4.59% | 4.56% | 3.16% | 3.22% | 3.73% | 4.56% | 3.94% | 4.21% | 4.58% |
SPLB SPDR Portfolio Long Term Corporate Bond ETF | 5.36% | 5.25% | 5.20% | 4.60% | 4.53% | 3.00% | 3.01% | 3.79% | 4.50% | 4.06% | 4.34% | 4.70% |
Frequently Asked Questions
With a correlation of 0.99, IGLB and SPLB 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.
SPLB has higher volatility (1.94%) compared to IGLB (1.89%). In terms of maximum drawdown, IGLB dropped -34.12% vs SPLB's -34.46%.
On 10-year performance, IGLB leads with 2.20% vs 2.19% for SPLB. On fees, IGLB is cheaper at 0.06% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, IGLB has performed better with a 2.20% return vs 2.19%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IGLB is cheaper with a 0.06% expense ratio, compared with 0.07% for SPLB.
SPLB has the higher dividend yield at 5.36%, compared with 5.24% for IGLB.
IGLB tracks ICE BofAML10+ Year US Corporate Index, while SPLB tracks Bloomberg Barclays Long U.S. Corporate Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.06% for IGLB and 0.07% for SPLB.
IGLB currently has the higher Sharpe Ratio (0.85 vs 0.80), 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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