GCOR vs. IUSB
GCOR (Goldman Sachs Access U.S. Aggregate Bond ETF) and IUSB (iShares Core Universal USD Bond ETF) are both exchange-traded funds - GCOR is a Intermediate Core Bond fund tracking the FTSE Goldman Sachs US Broad Bond Market Index, while IUSB is a Intermediate Core-Plus Bond fund tracking the Bloomberg U.S. Universal Index. Both are passively managed. Over the past 5 years, GCOR returned -0.24%/yr vs 0.44%/yr for IUSB. Their correlation of 0.93 suggests significant overlap in exposure. GCOR charges 0.08%/yr vs 0.06%/yr for IUSB.
Performance
GCOR vs. IUSB - Performance Comparison
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Returns By Period
In the year-to-date period, GCOR achieves a 0.16% return, which is significantly lower than IUSB's 0.43% return.
GCOR
- 1D
- -0.23%
- 1M
- 0.17%
- YTD
- 0.16%
- 6M
- 0.01%
- 1Y
- 4.97%
- 3Y*
- 3.71%
- 5Y*
- -0.24%
- 10Y*
- —
IUSB
- 1D
- -0.17%
- 1M
- 0.31%
- YTD
- 0.43%
- 6M
- 0.31%
- 1Y
- 5.54%
- 3Y*
- 4.51%
- 5Y*
- 0.44%
- 10Y*
- 1.94%
GCOR vs. IUSB - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | |
|---|---|---|---|---|---|---|---|
GCOR Goldman Sachs Access U.S. Aggregate Bond ETF | 0.16% | 7.22% | 0.51% | 5.79% | -13.83% | -1.88% | 0.39% |
IUSB iShares Core Universal USD Bond ETF | 0.43% | 7.38% | 2.11% | 6.23% | -13.04% | -1.33% | 1.15% |
Correlation
The correlation between GCOR and IUSB is 0.98 - 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 | 0.98 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.94 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.93 |
Correlation (All Time) Calculated using the full available price history since Sep 11, 2020 | 0.93 |
The correlation between GCOR and IUSB has been stable across timeframes, ranging from 0.93 to 0.98 - a consistent structural relationship.
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Return for Risk
GCOR vs. IUSB — Risk / Return Rank
GCOR
IUSB
GCOR vs. IUSB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Goldman Sachs Access U.S. Aggregate Bond ETF (GCOR) and iShares Core Universal USD Bond ETF (IUSB). 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.
| GCOR | IUSB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.17 | ||
| Sortino ratioReturn per unit of downside risk | -0.28 | ||
| Omega ratioGain probability vs. loss probability | 1.24 | 1.27 | -0.03 |
| Calmar ratioReturn relative to maximum drawdown | 1.77 | 2.20 | -0.43 |
| Martin ratioReturn relative to average drawdown | 5.42 | 6.68 | -1.26 |
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
| GCOR | IUSB | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.37 | 1.54 | -0.17 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.04 | 0.08 | -0.12 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.39 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | -0.10 | 0.46 | -0.56 |
Drawdowns
GCOR vs. IUSB - Drawdown Comparison
The maximum GCOR drawdown since its inception was -18.94%, which is greater than IUSB's maximum drawdown of -17.90%. Use the drawdown chart below to compare losses from any high point for GCOR and IUSB.
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Drawdown Indicators
| GCOR | IUSB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.94% | -17.90% | -1.04% |
Max Drawdown (1Y)Largest decline over 1 year | -2.82% | -2.53% | -0.29% |
Max Drawdown (3Y)Largest decline over 3 years | -6.09% | -5.82% | -0.27% |
Max Drawdown (5Y)Largest decline over 5 years | -18.63% | -17.87% | -0.76% |
Max Drawdown (10Y)Largest decline over 10 years | — | -17.90% | — |
Current DrawdownCurrent decline from peak | -3.52% | -1.33% | -2.19% |
Average DrawdownAverage peak-to-trough decline | -7.99% | -3.59% | -4.40% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.92% | 0.83% | +0.09% |
Volatility
GCOR vs. IUSB - Volatility Comparison
Goldman Sachs Access U.S. Aggregate Bond ETF (GCOR) and iShares Core Universal USD Bond ETF (IUSB) have volatilities of 1.27% and 1.24%, 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
| GCOR | IUSB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.27% | 1.24% | +0.03% |
Volatility (6M)Calculated over the trailing 6-month period | 2.65% | 2.62% | +0.03% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.65% | 3.62% | +0.03% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.81% | 5.79% | +0.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.52% | 5.04% | +0.48% |
GCOR vs. IUSB - Expense Ratio Comparison
GCOR has a 0.08% expense ratio, which is higher than IUSB's 0.06% 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
GCOR vs. IUSB - Dividend Comparison
GCOR's dividend yield for the trailing twelve months is around 4.17%, less than IUSB's 4.23% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
GCOR Goldman Sachs Access U.S. Aggregate Bond ETF | 4.17% | 4.03% | 4.36% | 3.67% | 2.11% | 0.92% | 0.24% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
IUSB iShares Core Universal USD Bond ETF | 4.23% | 4.17% | 4.04% | 3.46% | 2.53% | 1.74% | 2.68% | 3.04% | 2.98% | 2.56% | 2.60% | 1.95% |
Frequently Asked Questions
With a correlation of 0.98, GCOR and IUSB 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.
GCOR has higher volatility (1.27%) compared to IUSB (1.24%). In terms of maximum drawdown, GCOR dropped -18.94% vs IUSB's -17.90%.
On 5-year performance, IUSB leads with 0.44% vs -0.24% for GCOR. On fees, IUSB 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 5-year period, IUSB has performed better with a 0.44% return vs -0.24%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IUSB is cheaper with a 0.06% expense ratio, compared with 0.08% for GCOR.
IUSB has the higher dividend yield at 4.23%, compared with 4.17% for GCOR.
GCOR is categorized as Intermediate Core Bond, while IUSB is Intermediate Core-Plus Bond. GCOR tracks FTSE Goldman Sachs US Broad Bond Market Index, while IUSB tracks Bloomberg U.S. Universal Index. They also come from different issuers: Goldman Sachs and iShares. Their fees differ too: 0.08% for GCOR and 0.06% for IUSB.
IUSB currently has the higher Sharpe Ratio (1.54 vs 1.37), 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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