SMMD vs. WFBIX
SMMD (iShares Russell 2500 ETF) and WFBIX (iShares U.S. Aggregate Bond Index Fund) are both funds - SMMD is a Small Cap Growth Equities fund tracking the Russell 2500 Index, while WFBIX is a Intermediate Core Bond fund managed by BlackRock. Over the past 5 years, SMMD returned 7.65%/yr vs 0.82%/yr for WFBIX. At a 0.03 correlation, their price movements are largely independent. SMMD charges 0.15%/yr vs 0.05%/yr for WFBIX.
Performance
SMMD vs. WFBIX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, SMMD achieves a 20.07% return, which is significantly higher than WFBIX's 0.43% return.
SMMD
- 1D
- 0.98%
- 1M
- 3.73%
- YTD
- 20.07%
- 6M
- 17.82%
- 1Y
- 38.70%
- 3Y*
- 17.74%
- 5Y*
- 7.65%
- 10Y*
- —
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 vs. WFBIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
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% |
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% |
Correlation
The correlation between SMMD and WFBIX 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, SMMD and WFBIX have become more correlated (0.30) than their long-term average of 0.03, meaning their price movements have been converging.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
SMMD vs. WFBIX — Risk / Return Rank
SMMD
WFBIX
SMMD vs. WFBIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2500 ETF (SMMD) 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.
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.
| SMMD | WFBIX | 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 | 1.35 | 1.22 | +0.12 |
| Calmar ratioReturn relative to maximum drawdown | 3.78 | 1.62 | +2.15 |
| Martin ratioReturn relative to average drawdown | 14.33 | 4.66 | +9.67 |
Loading charts...
Drawdowns
SMMD vs. WFBIX - Drawdown Comparison
The maximum SMMD drawdown since its inception was -41.06%, which is greater than WFBIX's maximum drawdown of -18.68%. Use the drawdown chart below to compare losses from any high point for SMMD and WFBIX.
Loading charts...
Drawdown Indicators
| SMMD | WFBIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -41.06% | -18.68% | -22.38% |
Max Drawdown (1Y)Largest decline over 1 year | -9.66% | -3.02% | -6.64% |
Max Drawdown (3Y)Largest decline over 3 years | -25.50% | -6.09% | -19.41% |
Max Drawdown (5Y)Largest decline over 5 years | -28.26% | -17.84% | -10.42% |
Max Drawdown (10Y)Largest decline over 10 years | — | -18.68% | — |
Current DrawdownCurrent decline from peak | 0.00% | -1.50% | +1.50% |
Average DrawdownAverage peak-to-trough decline | -8.35% | -2.26% | -6.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.55% | 1.05% | +1.50% |
Volatility
SMMD vs. WFBIX - Volatility Comparison
iShares Russell 2500 ETF (SMMD) has a higher volatility of 6.26% compared to iShares U.S. Aggregate Bond Index Fund (WFBIX) at 1.36%. This indicates that SMMD's price experiences larger fluctuations and is considered to be riskier than WFBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| SMMD | WFBIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.26% | 1.36% | +4.90% |
Volatility (6M)Calculated over the trailing 6-month period | 13.30% | 2.88% | +10.42% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.74% | 3.95% | +13.79% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 20.91% | 6.41% | +14.50% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.38% | 5.17% | +17.21% |
SMMD vs. WFBIX - Expense Ratio Comparison
SMMD 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%.
Dividends
SMMD vs. WFBIX - Dividend Comparison
SMMD's dividend yield for the trailing twelve months is around 1.04%, less than WFBIX's 3.91% 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
SMMD and WFBIX 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, SMMD dropped -41.06% vs WFBIX's -18.68%.
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.
Find the right allocation for SMMD and WFBIX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer