VBMFX vs. WFBIX
Compare and contrast key facts about Vanguard Total Bond Market Index Fund (VBMFX) and iShares U.S. Aggregate Bond Index Fund (WFBIX).
VBMFX is managed by Vanguard. It was launched on Dec 11, 1986. WFBIX is managed by BlackRock. It was launched on Jul 2, 1993.
Performance
VBMFX vs. WFBIX - Performance Comparison
Loading graphics...
VBMFX vs. WFBIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VBMFX Vanguard Total Bond Market Index Fund | -0.30% | 7.05% | 1.15% | 5.62% | -13.25% | -2.04% | 7.63% | 8.61% | -0.34% | 3.45% |
WFBIX iShares U.S. Aggregate Bond Index Fund | -0.24% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 8.72% | -0.08% | 3.39% |
Returns By Period
In the year-to-date period, VBMFX achieves a -0.30% return, which is significantly lower than WFBIX's -0.24% return. Over the past 10 years, VBMFX has underperformed WFBIX with an annualized return of 1.50%, while WFBIX has yielded a comparatively higher 2.00% annualized return.
VBMFX
- 1D
- 0.21%
- 1M
- -1.63%
- YTD
- -0.30%
- 6M
- 0.35%
- 1Y
- 3.55%
- 3Y*
- 3.40%
- 5Y*
- 0.08%
- 10Y*
- 1.50%
WFBIX
- 1D
- 0.22%
- 1M
- -1.62%
- YTD
- -0.24%
- 6M
- 0.51%
- 1Y
- 3.70%
- 3Y*
- 4.82%
- 5Y*
- 0.96%
- 10Y*
- 2.00%
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
VBMFX vs. WFBIX - Expense Ratio Comparison
VBMFX has a 0.15% expense ratio, which is higher than WFBIX's 0.05% 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%.
Return for Risk
VBMFX vs. WFBIX — Risk / Return Rank
VBMFX
WFBIX
VBMFX vs. WFBIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Bond Market Index Fund (VBMFX) and iShares U.S. Aggregate Bond Index Fund (WFBIX). 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.
| VBMFX | WFBIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.90 | 0.92 | -0.02 |
Sortino ratioReturn per unit of downside risk | 1.30 | 1.32 | -0.02 |
Omega ratioGain probability vs. loss probability | 1.16 | 1.16 | -0.01 |
Calmar ratioReturn relative to maximum drawdown | 1.62 | 1.60 | +0.01 |
Martin ratioReturn relative to average drawdown | 4.56 | 4.49 | +0.07 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Loading graphics...
Sharpe Ratios by Period
| VBMFX | WFBIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.90 | 0.92 | -0.02 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.01 | 0.15 | -0.14 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.30 | 0.39 | -0.09 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.96 | 0.94 | +0.02 |
Correlation
The correlation between VBMFX and WFBIX is 0.90, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
VBMFX vs. WFBIX - Dividend Comparison
VBMFX's dividend yield for the trailing twelve months is around 3.50%, which matches WFBIX's 3.53% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VBMFX Vanguard Total Bond Market Index Fund | 3.50% | 3.76% | 3.57% | 2.99% | 2.49% | 1.72% | 2.31% | 2.63% | 2.47% | 2.45% | 2.43% | 2.71% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 3.53% | 3.78% | 3.68% | 6.82% | 2.60% | 2.04% | 2.43% | 2.88% | 2.71% | 2.24% | 2.25% | 2.20% |
Drawdowns
VBMFX vs. WFBIX - Drawdown Comparison
The maximum VBMFX drawdown since its inception was -19.08%, roughly equal to the maximum WFBIX drawdown of -18.68%. Use the drawdown chart below to compare losses from any high point for VBMFX and WFBIX.
Loading graphics...
Drawdown Indicators
| VBMFX | WFBIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.08% | -18.68% | -0.40% |
Max Drawdown (1Y)Largest decline over 1 year | -2.73% | -2.80% | +0.07% |
Max Drawdown (5Y)Largest decline over 5 years | -18.24% | -17.84% | -0.40% |
Max Drawdown (10Y)Largest decline over 10 years | -19.08% | -18.68% | -0.40% |
Current DrawdownCurrent decline from peak | -3.56% | -2.15% | -1.41% |
Average DrawdownAverage peak-to-trough decline | -2.70% | -2.27% | -0.43% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.97% | 1.00% | -0.03% |
Volatility
VBMFX vs. WFBIX - Volatility Comparison
Vanguard Total Bond Market Index Fund (VBMFX) and iShares U.S. Aggregate Bond Index Fund (WFBIX) have volatilities of 1.55% and 1.55%, 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.
Loading graphics...
Volatility by Period
| VBMFX | WFBIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.55% | 1.55% | 0.00% |
Volatility (6M)Calculated over the trailing 6-month period | 2.58% | 2.59% | -0.01% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.35% | 4.42% | -0.07% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.99% | 6.37% | -0.38% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.96% | 5.15% | -0.19% |