SPAB vs. KORP
SPAB (SPDR Portfolio Aggregate Bond ETF) and KORP (American Century Diversified Corporate Bond ETF) are both exchange-traded funds - SPAB is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Bond Index, while KORP is a Corporate Bonds fund actively managed by American Century. SPAB is passively managed, while KORP is actively managed. Over the past 5 years, SPAB returned -0.41%/yr vs 1.29%/yr for KORP. Their correlation of 0.83 means they have usually moved in the same direction. SPAB charges 0.03%/yr vs 0.29%/yr for KORP.
Performance
SPAB vs. KORP - Performance Comparison
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Returns By Period
In the year-to-date period, SPAB achieves a -0.51% return, which is significantly lower than KORP's -0.47% return.
SPAB
- 1D
- -0.20%
- 1M
- -1.14%
- 6M
- -0.78%
- YTD
- -0.51%
- 1Y
- 1.84%
- 3Y*
- 3.92%
- 5Y*
- -0.41%
- 10Y*
- 1.33%
- ALL TIME*
- 3.02%
KORP
- 1D
- -0.13%
- 1M
- -1.73%
- 6M
- -0.90%
- YTD
- -0.47%
- 1Y
- 2.17%
- 3Y*
- 5.42%
- 5Y*
- 1.29%
- 10Y*
- —
- ALL TIME*
- 2.63%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $4.70M | $4.70M | $4.63M | |
| $45.27M | $52.69M | $59.67M |
SPAB vs. KORP - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
SPAB SPDR Portfolio Aggregate Bond ETF | -0.51% | 7.25% | 1.25% | 5.56% | -13.04% | -1.77% | 7.39% | 8.67% | 0.31% |
KORP American Century Diversified Corporate Bond ETF | -0.47% | 8.14% | 3.82% | 7.40% | -10.04% | -0.55% | 6.99% | 10.08% | -1.32% |
Correlation
The correlation between SPAB and KORP is 0.94, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.94 |
Correlation (3Y) Balances recent behavior with more history. | 0.94 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.93 |
Correlation (All Time) Calculated using the full available price history since Jan 16, 2018 | 0.83 |
The correlation between SPAB and KORP shifts across timeframes, from 0.83 (all time) to 0.94 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
SPAB vs. KORP — Risk / Return Rank
SPAB
KORP
SPAB vs. KORP - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio Aggregate Bond ETF (SPAB) and American Century Diversified Corporate Bond ETF (KORP). 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.
| SPAB | KORP | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.05 | ||
| Sortino ratioReturn per unit of downside risk | +0.11 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 1.12 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.01 | 0.92 | +0.08 |
| Martin ratioReturn relative to average drawdown | 2.47 | 2.74 | -0.27 |
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Drawdowns
SPAB vs. KORP - Drawdown Comparison
The maximum SPAB drawdown since its inception was -18.56%, which is greater than KORP's maximum drawdown of -14.90%. Use the drawdown chart below to compare losses from any high point for SPAB and KORP.
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Drawdown Indicators
| SPAB | KORP | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.56% | -14.90% | -3.66% |
Max Drawdown (1Y)Largest decline over 1 year | -2.74% | -3.22% | +0.48% |
Max Drawdown (3Y)Largest decline over 3 years | -4.93% | -5.04% | +0.11% |
Max Drawdown (5Y)Largest decline over 5 years | -17.93% | -14.82% | -3.11% |
Max Drawdown (10Y)Largest decline over 10 years | -18.56% | — | — |
Current DrawdownCurrent decline from peak | -3.05% | -2.21% | -0.84% |
Average DrawdownAverage peak-to-trough decline | -3.07% | -3.21% | +0.14% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.12% | 1.08% | +0.04% |
Volatility
SPAB vs. KORP - Volatility Comparison
The current volatility for SPDR Portfolio Aggregate Bond ETF (SPAB) is 1.01%, while American Century Diversified Corporate Bond ETF (KORP) has a volatility of 1.10%. This indicates that SPAB experiences smaller price fluctuations and is considered to be less risky than KORP based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| SPAB | KORP | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.01% | 1.10% | -0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 2.85% | 3.43% | -0.58% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.69% | 4.28% | -0.59% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.93% | 5.39% | +0.54% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.55% | 4.90% | +0.65% |
SPAB vs. KORP - Expense Ratio Comparison
SPAB has a 0.03% expense ratio, which is lower than KORP's 0.29% expense ratio.
Dividends
SPAB vs. KORP - Dividend Comparison
SPAB's dividend yield for the trailing twelve months is around 4.11%, less than KORP's 5.20% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
KORP American Century Diversified Corporate Bond ETF | 4.74% | 4.98% | 5.08% | 4.42% | 2.89% | 1.86% | 3.22% | 3.20% | 2.97% | 0.00% | 0.00% | 0.00% |
SPAB SPDR Portfolio Aggregate Bond ETF | 3.77% | 3.97% | 3.86% | 3.34% | 2.59% | 2.11% | 2.43% | 2.92% | 2.96% | 2.67% | 2.63% | 2.59% |
Frequently Asked Questions
With a correlation of 0.94, SPAB and KORP 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.
KORP has higher volatility (1.10%) compared to SPAB (1.01%). In terms of maximum drawdown, SPAB dropped -18.56% vs KORP's -14.90%.
On 5-year performance, KORP leads with 1.29% vs -0.41% for SPAB. On fees, SPAB 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 5-year period, KORP has performed better with a 1.29% return vs -0.41%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
SPAB is cheaper with a 0.03% expense ratio, compared with 0.29% for KORP.
KORP has the higher dividend yield at 4.74%, compared with 3.77% for SPAB.
SPAB is categorized as Total Bond Market, while KORP is Corporate Bonds. They also come from different issuers: State Street and American Century. Their fees differ too: 0.03% for SPAB and 0.29% for KORP.
SPAB currently has the higher Sharpe Ratio (0.75 vs 0.69), 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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