IBDT vs. VTC
IBDT (iShares iBonds Dec 2028 Term Corporate ETF) and VTC (Vanguard Total Corporate Bond ETF) are both Corporate Bonds funds - IBDT tracks the Bloomberg December 2028 Maturity Corporate Index while VTC tracks the Bloomberg U.S. Corporate Bond Index. Both are passively managed. Over the past 5 years, IBDT returned 1.25%/yr vs 0.35%/yr for VTC. Their correlation of 0.82 suggests significant overlap in exposure. IBDT charges 0.10%/yr vs 0.03%/yr for VTC.
Performance
IBDT vs. VTC - Performance Comparison
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Returns By Period
The year-to-date returns for both stocks are quite close, with IBDT having a 0.86% return and VTC slightly lower at 0.84%.
IBDT
- 1D
- 0.06%
- 1M
- 0.31%
- YTD
- 0.86%
- 6M
- 1.12%
- 1Y
- 4.14%
- 3Y*
- 5.64%
- 5Y*
- 1.25%
- 10Y*
- —
VTC
- 1D
- 0.14%
- 1M
- 0.79%
- YTD
- 0.84%
- 6M
- 0.89%
- 1Y
- 5.12%
- 3Y*
- 5.23%
- 5Y*
- 0.35%
- 10Y*
- —
IBDT vs. VTC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
IBDT iShares iBonds Dec 2028 Term Corporate ETF | 0.86% | 7.02% | 3.97% | 7.72% | -11.42% | -1.90% | 9.62% | 15.15% | 1.47% |
VTC Vanguard Total Corporate Bond ETF | 0.84% | 7.58% | 2.15% | 8.58% | -15.68% | -1.41% | 9.30% | 14.60% | 0.25% |
Correlation
The correlation between IBDT and VTC is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.79 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.87 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.88 |
Correlation (All Time) Calculated using the full available price history since Sep 20, 2018 | 0.82 |
The correlation between IBDT and VTC has been stable across timeframes, ranging from 0.79 to 0.88 - a consistent structural relationship.
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Return for Risk
IBDT vs. VTC — Risk / Return Rank
IBDT
VTC
IBDT vs. VTC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2028 Term Corporate ETF (IBDT) and Vanguard Total Corporate Bond ETF (VTC). 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.
| IBDT | VTC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.39 | ||
| Sortino ratioReturn per unit of downside risk | +2.30 | ||
| Omega ratioGain probability vs. loss probability | 1.53 | 1.21 | +0.32 |
| Calmar ratioReturn relative to maximum drawdown | 4.04 | 1.79 | +2.25 |
| Martin ratioReturn relative to average drawdown | 18.44 | 5.54 | +12.90 |
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Drawdowns
IBDT vs. VTC - Drawdown Comparison
The maximum IBDT drawdown since its inception was -17.79%, smaller than the maximum VTC drawdown of -22.05%. Use the drawdown chart below to compare losses from any high point for IBDT and VTC.
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Drawdown Indicators
| IBDT | VTC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.79% | -22.05% | +4.26% |
Max Drawdown (1Y)Largest decline over 1 year | -1.03% | -2.88% | +1.85% |
Max Drawdown (3Y)Largest decline over 3 years | -3.19% | -6.46% | +3.27% |
Max Drawdown (5Y)Largest decline over 5 years | -17.68% | -22.05% | +4.37% |
Current DrawdownCurrent decline from peak | -0.12% | -0.74% | +0.62% |
Average DrawdownAverage peak-to-trough decline | -4.13% | -5.81% | +1.68% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.22% | 0.93% | -0.71% |
Volatility
IBDT vs. VTC - Volatility Comparison
The current volatility for iShares iBonds Dec 2028 Term Corporate ETF (IBDT) is 0.49%, while Vanguard Total Corporate Bond ETF (VTC) has a volatility of 1.20%. This indicates that IBDT experiences smaller price fluctuations and is considered to be less risky than VTC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBDT | VTC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.49% | 1.20% | -0.71% |
Volatility (6M)Calculated over the trailing 6-month period | 1.10% | 3.31% | -2.21% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.62% | 4.34% | -2.72% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.06% | 7.08% | -2.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 6.35% | 7.67% | -1.32% |
IBDT vs. VTC - Expense Ratio Comparison
IBDT has a 0.10% expense ratio, which is higher than VTC'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
IBDT vs. VTC - Dividend Comparison
IBDT's dividend yield for the trailing twelve months is around 4.54%, less than VTC's 4.92% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 |
|---|---|---|---|---|---|---|---|---|---|---|
IBDT iShares iBonds Dec 2028 Term Corporate ETF | 4.54% | 4.56% | 4.67% | 4.10% | 3.25% | 2.45% | 2.80% | 3.32% | 1.47% | 0.00% |
VTC Vanguard Total Corporate Bond ETF | 4.92% | 4.76% | 4.50% | 3.80% | 3.13% | 2.36% | 2.69% | 3.34% | 3.53% | 0.55% |
Frequently Asked Questions
IBDT and VTC have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VTC has higher volatility (1.20%) compared to IBDT (0.49%). In terms of maximum drawdown, IBDT dropped -17.79% vs VTC's -22.05%.
On 5-year performance, IBDT leads with 1.25% vs 0.35% for VTC. On fees, VTC is cheaper at 0.03% per year. On volatility, IBDT has been the lower-risk option at 0.49%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, IBDT has performed better with a 1.25% return vs 0.35%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
VTC is cheaper with a 0.03% expense ratio, compared with 0.10% for IBDT.
VTC has the higher dividend yield at 4.92%, compared with 4.54% for IBDT.
IBDT tracks Bloomberg December 2028 Maturity Corporate Index, while VTC tracks Bloomberg U.S. Corporate Bond Index. They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.10% for IBDT and 0.03% for VTC.
IBDT currently has the higher Sharpe Ratio (2.58 vs 1.19), 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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