GCOR vs. IBTO
GCOR (Goldman Sachs Access U.S. Aggregate Bond ETF) and IBTO (iShares iBonds Dec 2033 Term Treasury ETF) are both Intermediate Core Bond funds - GCOR tracks the FTSE Goldman Sachs US Broad Bond Market Index while IBTO tracks the ICE 2033 Maturity US Treasury Index. Both are passively managed. Over the past year, GCOR returned 4.26% vs 2.97% for IBTO. Their correlation of 0.94 suggests significant overlap in exposure. GCOR charges 0.08%/yr vs 0.07%/yr for IBTO.
Performance
GCOR vs. IBTO - Performance Comparison
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Returns By Period
In the year-to-date period, GCOR achieves a 0.41% return, which is significantly higher than IBTO's -0.53% return.
GCOR
- 1D
- 0.09%
- 1M
- 0.72%
- YTD
- 0.41%
- 6M
- 0.49%
- 1Y
- 4.26%
- 3Y*
- 3.70%
- 5Y*
- -0.23%
- 10Y*
- —
IBTO
- 1D
- 0.10%
- 1M
- 0.47%
- YTD
- -0.53%
- 6M
- -0.45%
- 1Y
- 2.97%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
GCOR vs. IBTO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | |
|---|---|---|---|---|
GCOR Goldman Sachs Access U.S. Aggregate Bond ETF | 0.41% | 7.22% | 0.51% | 2.88% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | -0.53% | 8.23% | -0.87% | 1.71% |
Correlation
The correlation between GCOR and IBTO is 0.96 - 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 | 0.96 |
Correlation (All Time) Calculated using the full available price history since Jun 29, 2023 | 0.94 |
The correlation between GCOR and IBTO has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.
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Return for Risk
GCOR vs. IBTO — Risk / Return Rank
GCOR
IBTO
GCOR vs. IBTO - 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 iBonds Dec 2033 Term Treasury ETF (IBTO). 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.
| GCOR | IBTO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.51 | ||
| Sortino ratioReturn per unit of downside risk | +0.72 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.12 | +0.09 |
| Calmar ratioReturn relative to maximum drawdown | 1.52 | 0.82 | +0.70 |
| Martin ratioReturn relative to average drawdown | 4.35 | 2.14 | +2.21 |
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Drawdowns
GCOR vs. IBTO - Drawdown Comparison
The maximum GCOR drawdown since its inception was -18.94%, which is greater than IBTO's maximum drawdown of -8.36%. Use the drawdown chart below to compare losses from any high point for GCOR and IBTO.
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Drawdown Indicators
| GCOR | IBTO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.94% | -8.36% | -10.58% |
Max Drawdown (1Y)Largest decline over 1 year | -2.82% | -3.66% | +0.84% |
Max Drawdown (3Y)Largest decline over 3 years | -6.09% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -18.63% | — | — |
Current DrawdownCurrent decline from peak | -3.27% | -2.59% | -0.68% |
Average DrawdownAverage peak-to-trough decline | -7.94% | -2.37% | -5.57% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.98% | 1.39% | -0.41% |
Volatility
GCOR vs. IBTO - Volatility Comparison
The current volatility for Goldman Sachs Access U.S. Aggregate Bond ETF (GCOR) is 1.05%, while iShares iBonds Dec 2033 Term Treasury ETF (IBTO) has a volatility of 1.27%. This indicates that GCOR experiences smaller price fluctuations and is considered to be less risky than IBTO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| GCOR | IBTO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.05% | 1.27% | -0.22% |
Volatility (6M)Calculated over the trailing 6-month period | 2.74% | 3.14% | -0.40% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.61% | 4.39% | -0.78% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.81% | 6.59% | -0.78% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.51% | 6.59% | -1.08% |
GCOR vs. IBTO - Expense Ratio Comparison
GCOR has a 0.08% expense ratio, which is higher than IBTO's 0.07% 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. IBTO - Dividend Comparison
GCOR's dividend yield for the trailing twelve months is around 4.16%, which matches IBTO's 4.15% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 |
|---|---|---|---|---|---|---|---|
GCOR Goldman Sachs Access U.S. Aggregate Bond ETF | 4.16% | 4.03% | 4.36% | 3.67% | 2.11% | 0.92% | 0.24% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | 4.15% | 4.05% | 4.23% | 1.66% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
With a correlation of 0.96, GCOR and IBTO 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.
IBTO has higher volatility (1.27%) compared to GCOR (1.05%). In terms of maximum drawdown, GCOR dropped -18.94% vs IBTO's -8.36%.
On 1-year performance, GCOR leads with 4.26% vs 2.97% for IBTO. On fees, IBTO is cheaper at 0.07% per year. On volatility, GCOR has been the lower-risk option at 1.05%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, GCOR has performed better with a 4.26% return vs 2.97%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IBTO is cheaper with a 0.07% expense ratio, compared with 0.08% for GCOR.
GCOR and IBTO have nearly identical dividend yields, around 4.16%.
GCOR tracks FTSE Goldman Sachs US Broad Bond Market Index, while IBTO tracks ICE 2033 Maturity US Treasury Index. They also come from different issuers: Goldman Sachs and iShares. Their fees differ too: 0.08% for GCOR and 0.07% for IBTO.
GCOR currently has the higher Sharpe Ratio (1.19 vs 0.68), 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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