SPIB vs. AGG
SPIB (SPDR Portfolio Intermediate Term Corporate Bond ETF) and AGG (iShares Core U.S. Aggregate Bond ETF) are both exchange-traded funds - SPIB is a Corporate Bonds fund tracking the Bloomberg US Aggregate Credit - Corporate - Investment Grade - Intermediate, while AGG is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index. Both are passively managed. Over the past 10 years, SPIB returned 2.86%/yr vs 1.57%/yr for AGG. A 0.78 correlation means they provide meaningful diversification when combined. SPIB charges 0.07%/yr vs 0.03%/yr for AGG.
Performance
SPIB vs. AGG - Performance Comparison
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Returns By Period
In the year-to-date period, SPIB achieves a 0.46% return, which is significantly higher than AGG's 0.25% return. Over the past 10 years, SPIB has outperformed AGG with an annualized return of 2.86%, while AGG has yielded a comparatively lower 1.57% annualized return.
SPIB
- 1D
- -0.09%
- 1M
- 0.25%
- YTD
- 0.46%
- 6M
- 0.59%
- 1Y
- 5.27%
- 3Y*
- 5.79%
- 5Y*
- 1.79%
- 10Y*
- 2.86%
AGG
- 1D
- -0.21%
- 1M
- 0.24%
- YTD
- 0.25%
- 6M
- 0.09%
- 1Y
- 5.14%
- 3Y*
- 3.95%
- 5Y*
- 0.10%
- 10Y*
- 1.57%
SPIB vs. AGG - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SPIB SPDR Portfolio Intermediate Term Corporate Bond ETF | 0.46% | 7.91% | 4.28% | 7.27% | -9.65% | -1.24% | 7.69% | 10.23% | -0.49% | 3.76% |
AGG iShares Core U.S. Aggregate Bond ETF | 0.25% | 7.19% | 1.31% | 5.65% | -13.02% | -1.77% | 7.48% | 8.46% | 0.09% | 3.55% |
Correlation
The correlation between SPIB and AGG 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 (3Y) Calculated over the trailing 3-year period | 0.95 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.94 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.89 |
Correlation (All Time) Calculated using the full available price history since Feb 23, 2009 | 0.78 |
The correlation between SPIB and AGG shifts across timeframes, from 0.78 (all time) to 0.95 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
SPIB vs. AGG — Risk / Return Rank
SPIB
AGG
SPIB vs. AGG - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) and iShares Core U.S. Aggregate Bond ETF (AGG). 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.
| SPIB | AGG | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.53 | ||
| Sortino ratioReturn per unit of downside risk | +0.87 | ||
| Omega ratioGain probability vs. loss probability | 1.34 | 1.24 | +0.11 |
| Calmar ratioReturn relative to maximum drawdown | 2.62 | 1.87 | +0.75 |
| Martin ratioReturn relative to average drawdown | 9.13 | 5.73 | +3.40 |
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
| SPIB | AGG | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.87 | 1.34 | +0.53 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.40 | 0.02 | +0.39 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.62 | 0.29 | +0.33 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.88 | 0.59 | +0.28 |
Drawdowns
SPIB vs. AGG - Drawdown Comparison
The maximum SPIB drawdown since its inception was -14.94%, smaller than the maximum AGG drawdown of -18.43%. Use the drawdown chart below to compare losses from any high point for SPIB and AGG.
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Drawdown Indicators
| SPIB | AGG | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -14.94% | -18.43% | +3.49% |
Max Drawdown (1Y)Largest decline over 1 year | -2.02% | -2.76% | +0.74% |
Max Drawdown (3Y)Largest decline over 3 years | -3.18% | -6.11% | +2.93% |
Max Drawdown (5Y)Largest decline over 5 years | -14.80% | -17.82% | +3.02% |
Max Drawdown (10Y)Largest decline over 10 years | -14.94% | -18.43% | +3.49% |
Current DrawdownCurrent decline from peak | -0.78% | -2.14% | +1.36% |
Average DrawdownAverage peak-to-trough decline | -1.89% | -2.71% | +0.82% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.58% | 0.90% | -0.32% |
Volatility
SPIB vs. AGG - Volatility Comparison
The current volatility for SPDR Portfolio Intermediate Term Corporate Bond ETF (SPIB) is 0.93%, while iShares Core U.S. Aggregate Bond ETF (AGG) has a volatility of 1.30%. This indicates that SPIB experiences smaller price fluctuations and is considered to be less risky than AGG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SPIB | AGG | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.93% | 1.30% | -0.37% |
Volatility (6M)Calculated over the trailing 6-month period | 2.09% | 2.74% | -0.65% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.83% | 3.85% | -1.02% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.47% | 6.09% | -1.62% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.60% | 5.40% | -0.80% |
SPIB vs. AGG - Expense Ratio Comparison
SPIB has a 0.07% expense ratio, which is higher than AGG'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
SPIB vs. AGG - Dividend Comparison
SPIB's dividend yield for the trailing twelve months is around 4.46%, more than AGG's 3.99% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AGG iShares Core U.S. Aggregate Bond ETF | 3.99% | 3.89% | 3.74% | 3.13% | 2.39% | 1.77% | 2.14% | 2.70% | 2.72% | 2.32% | 2.39% | 2.45% |
SPIB SPDR Portfolio Intermediate Term Corporate Bond ETF | 4.46% | 4.42% | 4.41% | 3.84% | 2.65% | 1.58% | 2.18% | 3.03% | 3.04% | 2.79% | 2.68% | 2.69% |
Frequently Asked Questions
With a correlation of 0.94, SPIB and AGG 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.
AGG has higher volatility (1.30%) compared to SPIB (0.93%). In terms of maximum drawdown, SPIB dropped -14.94% vs AGG's -18.43%.
On 10-year performance, SPIB leads with 2.86% vs 1.57% for AGG. On fees, AGG is cheaper at 0.03% per year. On volatility, SPIB has been the lower-risk option at 0.93%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, SPIB has performed better with a 2.86% return vs 1.57%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
AGG is cheaper with a 0.03% expense ratio, compared with 0.07% for SPIB.
SPIB has the higher dividend yield at 4.46%, compared with 3.99% for AGG.
SPIB is categorized as Corporate Bonds, while AGG is Total Bond Market. SPIB tracks Bloomberg US Aggregate Credit - Corporate - Investment Grade - Intermediate, while AGG tracks Bloomberg U.S. Aggregate Bond Index. They also come from different issuers: State Street and iShares. Their fees differ too: 0.07% for SPIB and 0.03% for AGG.
SPIB currently has the higher Sharpe Ratio (1.87 vs 1.34), 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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