WFBIX vs. SMMD
WFBIX (iShares U.S. Aggregate Bond Index Fund) and SMMD (iShares Russell 2500 ETF) are both funds - WFBIX is a Intermediate Core Bond fund managed by BlackRock, while SMMD is a Small Cap Growth Equities fund tracking the Russell 2500 Index. Over the past 5 years, WFBIX returned 0.82%/yr vs 7.65%/yr for SMMD. At a 0.03 correlation, their price movements are largely independent. WFBIX charges 0.05%/yr vs 0.15%/yr for SMMD.
Performance
WFBIX vs. SMMD - Performance Comparison
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Returns By Period
In the year-to-date period, WFBIX achieves a 0.43% return, which is significantly lower than SMMD's 20.07% return.
WFBIX
- 1D
- 0.55%
- 1M
- 0.56%
- YTD
- 0.43%
- 6M
- 0.98%
- 1Y
- 4.88%
- 3Y*
- 5.33%
- 5Y*
- 0.82%
- 10Y*
- 1.91%
SMMD
- 1D
- 0.98%
- 1M
- 3.73%
- YTD
- 20.07%
- 6M
- 17.82%
- 1Y
- 38.70%
- 3Y*
- 17.74%
- 5Y*
- 7.65%
- 10Y*
- —
WFBIX vs. SMMD - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
WFBIX iShares U.S. Aggregate Bond Index Fund | 0.43% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 8.72% | -0.08% | 1.45% |
SMMD iShares Russell 2500 ETF | 20.07% | 11.72% | 11.87% | 17.71% | -18.53% | 18.30% | 19.98% | 28.01% | -10.58% | 11.27% |
Correlation
The correlation between WFBIX and SMMD is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.31 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.25 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.15 |
Correlation (All Time) Calculated using the full available price history since Jul 7, 2017 | 0.03 |
Over the past year, WFBIX and SMMD have become more correlated (0.30) than their long-term average of 0.03, meaning their price movements have been converging.
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Return for Risk
WFBIX vs. SMMD — Risk / Return Rank
WFBIX
SMMD
WFBIX vs. SMMD - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares U.S. Aggregate Bond Index Fund (WFBIX) and iShares Russell 2500 ETF (SMMD). 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.
| WFBIX | SMMD | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.81 | ||
| Sortino ratioReturn per unit of downside risk | -0.99 | ||
| Omega ratioGain probability vs. loss probability | 1.22 | 1.35 | -0.12 |
| Calmar ratioReturn relative to maximum drawdown | 1.62 | 3.78 | -2.15 |
| Martin ratioReturn relative to average drawdown | 4.66 | 14.33 | -9.67 |
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Drawdowns
WFBIX vs. SMMD - Drawdown Comparison
The maximum WFBIX drawdown since its inception was -18.68%, smaller than the maximum SMMD drawdown of -41.06%. Use the drawdown chart below to compare losses from any high point for WFBIX and SMMD.
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Drawdown Indicators
| WFBIX | SMMD | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.68% | -41.06% | +22.38% |
Max Drawdown (1Y)Largest decline over 1 year | -3.02% | -9.66% | +6.64% |
Max Drawdown (3Y)Largest decline over 3 years | -6.09% | -25.50% | +19.41% |
Max Drawdown (5Y)Largest decline over 5 years | -17.84% | -28.26% | +10.42% |
Max Drawdown (10Y)Largest decline over 10 years | -18.68% | — | — |
Current DrawdownCurrent decline from peak | -1.50% | 0.00% | -1.50% |
Average DrawdownAverage peak-to-trough decline | -2.26% | -8.35% | +6.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.05% | 2.55% | -1.50% |
Volatility
WFBIX vs. SMMD - Volatility Comparison
The current volatility for iShares U.S. Aggregate Bond Index Fund (WFBIX) is 1.36%, while iShares Russell 2500 ETF (SMMD) has a volatility of 6.26%. This indicates that WFBIX experiences smaller price fluctuations and is considered to be less risky than SMMD based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| WFBIX | SMMD | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.36% | 6.26% | -4.90% |
Volatility (6M)Calculated over the trailing 6-month period | 2.88% | 13.30% | -10.42% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.95% | 17.74% | -13.79% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.41% | 20.91% | -14.50% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.17% | 22.38% | -17.21% |
WFBIX vs. SMMD - Expense Ratio Comparison
WFBIX has a 0.05% expense ratio, which is lower than SMMD's 0.15% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
WFBIX vs. SMMD - Dividend Comparison
WFBIX's dividend yield for the trailing twelve months is around 3.91%, more than SMMD's 1.04% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SMMD iShares Russell 2500 ETF | 1.04% | 1.28% | 1.27% | 1.44% | 1.79% | 1.12% | 1.31% | 1.50% | 2.45% | 0.68% | 0.00% | 0.00% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 3.91% | 3.78% | 3.68% | 6.82% | 2.60% | 2.04% | 2.43% | 2.88% | 2.71% | 2.24% | 2.25% | 2.20% |
Frequently Asked Questions
WFBIX and SMMD have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
SMMD has higher volatility (6.26%) compared to WFBIX (1.36%). In terms of maximum drawdown, WFBIX dropped -18.68% vs SMMD's -41.06%.
SMMD currently has the higher Sharpe Ratio (2.06 vs 1.25), 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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