BSMIX vs. WFSPX
BSMIX (iShares Russell Small/Mid-Cap Index Fund) and WFSPX (iShares S&P 500 Index Fund) are both mutual funds - BSMIX is a Small Cap Blend Equities fund managed by BlackRock, while WFSPX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, BSMIX returned 11.77%/yr vs 15.54%/yr for WFSPX. Their correlation of 0.85 suggests significant overlap in exposure. BSMIX charges 0.12%/yr vs 0.03%/yr for WFSPX.
Performance
BSMIX vs. WFSPX - Performance Comparison
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Returns By Period
In the year-to-date period, BSMIX achieves a 19.06% return, which is significantly higher than WFSPX's 11.69% return. Over the past 10 years, BSMIX has underperformed WFSPX with an annualized return of 11.77%, while WFSPX has yielded a comparatively higher 15.54% annualized return.
BSMIX
- 1D
- 0.93%
- 1M
- 5.13%
- YTD
- 19.06%
- 6M
- 18.96%
- 1Y
- 36.89%
- 3Y*
- 18.79%
- 5Y*
- 7.82%
- 10Y*
- 11.77%
WFSPX
- 1D
- 0.13%
- 1M
- 5.80%
- YTD
- 11.69%
- 6M
- 11.72%
- 1Y
- 28.93%
- 3Y*
- 22.71%
- 5Y*
- 14.24%
- 10Y*
- 15.54%
BSMIX vs. WFSPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BSMIX iShares Russell Small/Mid-Cap Index Fund | 19.06% | 11.92% | 12.04% | 17.15% | -18.39% | 18.00% | 20.28% | 27.62% | -10.22% | 16.75% |
WFSPX iShares S&P 500 Index Fund | 11.69% | 17.83% | 24.94% | 26.25% | -18.14% | 28.63% | 18.43% | 31.45% | -4.83% | 21.27% |
Correlation
The correlation between BSMIX and WFSPX is 0.80, 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 | 0.80 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.79 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.84 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.84 |
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016 | 0.85 |
The correlation between BSMIX and WFSPX has been stable across timeframes, ranging from 0.79 to 0.85 - a consistent structural relationship.
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Return for Risk
BSMIX vs. WFSPX — Risk / Return Rank
BSMIX
WFSPX
BSMIX vs. WFSPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell Small/Mid-Cap Index Fund (BSMIX) and iShares S&P 500 Index Fund (WFSPX). 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.
| BSMIX | WFSPX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.25 | ||
| Sortino ratioReturn per unit of downside risk | -0.28 | ||
| Omega ratioGain probability vs. loss probability | 1.38 | 1.46 | -0.08 |
| Calmar ratioReturn relative to maximum drawdown | 4.15 | 3.35 | +0.80 |
| Martin ratioReturn relative to average drawdown | 15.76 | 15.65 | +0.11 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| BSMIX | WFSPX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.26 | 2.52 | -0.25 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.37 | 0.85 | -0.48 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.54 | 0.87 | -0.32 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.56 | 0.13 | +0.42 |
Drawdowns
BSMIX vs. WFSPX - Drawdown Comparison
The maximum BSMIX drawdown since its inception was -41.32%, smaller than the maximum WFSPX drawdown of -58.21%. Use the drawdown chart below to compare losses from any high point for BSMIX and WFSPX.
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Drawdown Indicators
| BSMIX | WFSPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -41.32% | -58.21% | +16.89% |
Max Drawdown (1Y)Largest decline over 1 year | -9.39% | -8.90% | -0.49% |
Max Drawdown (3Y)Largest decline over 3 years | -25.49% | -18.74% | -6.75% |
Max Drawdown (5Y)Largest decline over 5 years | -28.33% | -24.51% | -3.82% |
Max Drawdown (10Y)Largest decline over 10 years | -41.32% | -33.74% | -7.58% |
Current DrawdownCurrent decline from peak | 0.00% | 0.00% | 0.00% |
Average DrawdownAverage peak-to-trough decline | -7.41% | -12.77% | +5.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.47% | 1.90% | +0.57% |
Volatility
BSMIX vs. WFSPX - Volatility Comparison
iShares Russell Small/Mid-Cap Index Fund (BSMIX) has a higher volatility of 5.13% compared to iShares S&P 500 Index Fund (WFSPX) at 2.82%. This indicates that BSMIX's price experiences larger fluctuations and is considered to be riskier than WFSPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BSMIX | WFSPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.13% | 2.82% | +2.31% |
Volatility (6M)Calculated over the trailing 6-month period | 12.67% | 8.97% | +3.70% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.21% | 11.85% | +5.36% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.18% | 16.88% | +4.30% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.71% | 18.02% | +3.69% |
BSMIX vs. WFSPX - Expense Ratio Comparison
BSMIX has a 0.12% expense ratio, which is higher than WFSPX'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
BSMIX vs. WFSPX - Dividend Comparison
BSMIX's dividend yield for the trailing twelve months is around 2.43%, more than WFSPX's 1.56% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BSMIX iShares Russell Small/Mid-Cap Index Fund | 2.43% | 2.90% | 2.04% | 1.37% | 4.94% | 4.77% | 4.42% | 2.83% | 4.33% | 2.83% | 1.45% | 0.00% |
WFSPX iShares S&P 500 Index Fund | 1.56% | 1.72% | 1.41% | 1.50% | 2.02% | 1.82% | 1.66% | 1.99% | 2.00% | 1.62% | 2.37% | 2.49% |
Frequently Asked Questions
BSMIX and WFSPX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
BSMIX has higher volatility (5.13%) compared to WFSPX (2.82%). In terms of maximum drawdown, BSMIX dropped -41.32% vs WFSPX's -58.21%.
WFSPX currently has the higher Sharpe Ratio (2.52 vs 2.26), 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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