MASKX vs. BSPGX
MASKX (iShares Russell 2000 Small-Cap Index Fund) and BSPGX (iShares S&P 500 Index Fund Class G) are both mutual funds - MASKX is a Small Cap Blend Equities fund managed by BlackRock, while BSPGX is a S&P 500 fund tracking the S&P 500 Index. Over the past 5 years, MASKX returned 6.53%/yr vs 14.26%/yr for BSPGX. Their correlation of 0.81 suggests significant overlap in exposure. MASKX charges 0.12%/yr vs 0.01%/yr for BSPGX.
Performance
MASKX vs. BSPGX - Performance Comparison
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Returns By Period
In the year-to-date period, MASKX achieves a 18.62% return, which is significantly higher than BSPGX's 11.70% return.
MASKX
- 1D
- 0.89%
- 1M
- 4.97%
- YTD
- 18.62%
- 6M
- 17.33%
- 1Y
- 41.04%
- 3Y*
- 18.52%
- 5Y*
- 6.53%
- 10Y*
- 11.12%
BSPGX
- 1D
- 0.13%
- 1M
- 5.80%
- YTD
- 11.70%
- 6M
- 11.73%
- 1Y
- 28.95%
- 3Y*
- 22.73%
- 5Y*
- 14.26%
- 10Y*
- —
MASKX vs. BSPGX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|---|---|
MASKX iShares Russell 2000 Small-Cap Index Fund | 18.62% | 12.76% | 11.35% | 16.99% | -20.39% | 14.54% | 19.99% | 7.78% |
BSPGX iShares S&P 500 Index Fund Class G | 11.70% | 17.85% | 24.96% | 26.27% | -18.12% | 28.66% | 19.16% | 11.06% |
Correlation
The correlation between MASKX and BSPGX 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 | 0.77 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.81 |
Correlation (All Time) Calculated using the full available price history since Jul 3, 2019 | 0.81 |
The correlation between MASKX and BSPGX has been stable across timeframes, ranging from 0.77 to 0.81 - a consistent structural relationship.
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Return for Risk
MASKX vs. BSPGX — Risk / Return Rank
MASKX
BSPGX
MASKX vs. BSPGX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell 2000 Small-Cap Index Fund (MASKX) and iShares S&P 500 Index Fund Class G (BSPGX). 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.
| MASKX | BSPGX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.24 | ||
| Sortino ratioReturn per unit of downside risk | -0.30 | ||
| Omega ratioGain probability vs. loss probability | 1.37 | 1.46 | -0.09 |
| Calmar ratioReturn relative to maximum drawdown | 3.95 | 3.35 | +0.59 |
| Martin ratioReturn relative to average drawdown | 14.03 | 15.67 | -1.64 |
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
| MASKX | BSPGX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.28 | 2.52 | -0.24 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.28 | 0.85 | -0.57 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.47 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.37 | 0.83 | -0.47 |
Drawdowns
MASKX vs. BSPGX - Drawdown Comparison
The maximum MASKX drawdown since its inception was -59.06%, which is greater than BSPGX's maximum drawdown of -33.74%. Use the drawdown chart below to compare losses from any high point for MASKX and BSPGX.
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Drawdown Indicators
| MASKX | BSPGX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -59.06% | -33.74% | -25.32% |
Max Drawdown (1Y)Largest decline over 1 year | -11.01% | -8.90% | -2.11% |
Max Drawdown (3Y)Largest decline over 3 years | -27.53% | -18.73% | -8.80% |
Max Drawdown (5Y)Largest decline over 5 years | -31.98% | -24.50% | -7.48% |
Max Drawdown (10Y)Largest decline over 10 years | -41.68% | — | — |
Current DrawdownCurrent decline from peak | -0.13% | 0.00% | -0.13% |
Average DrawdownAverage peak-to-trough decline | -11.63% | -5.09% | -6.54% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.09% | 1.90% | +1.19% |
Volatility
MASKX vs. BSPGX - Volatility Comparison
iShares Russell 2000 Small-Cap Index Fund (MASKX) has a higher volatility of 5.60% compared to iShares S&P 500 Index Fund Class G (BSPGX) at 2.82%. This indicates that MASKX's price experiences larger fluctuations and is considered to be riskier than BSPGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MASKX | BSPGX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.60% | 2.82% | +2.78% |
Volatility (6M)Calculated over the trailing 6-month period | 13.57% | 8.97% | +4.60% |
Volatility (1Y)Calculated over the trailing 1-year period | 19.10% | 11.85% | +7.25% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.16% | 16.88% | +6.28% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 23.70% | 20.01% | +3.69% |
MASKX vs. BSPGX - Expense Ratio Comparison
MASKX has a 0.12% expense ratio, which is higher than BSPGX's 0.01% 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
MASKX vs. BSPGX - Dividend Comparison
MASKX's dividend yield for the trailing twelve months is around 2.64%, more than BSPGX's 1.58% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BSPGX iShares S&P 500 Index Fund Class G | 1.58% | 1.74% | 1.43% | 1.52% | 2.04% | 1.83% | 2.09% | 2.25% | 0.00% | 0.00% | 0.00% | 0.00% |
MASKX iShares Russell 2000 Small-Cap Index Fund | 2.64% | 3.13% | 4.81% | 2.92% | 1.70% | 7.64% | 1.42% | 3.43% | 4.26% | 3.15% | 4.60% | 3.63% |
Frequently Asked Questions
MASKX and BSPGX 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.
MASKX has higher volatility (5.60%) compared to BSPGX (2.82%). In terms of maximum drawdown, MASKX dropped -59.06% vs BSPGX's -33.74%.
BSPGX currently has the higher Sharpe Ratio (2.52 vs 2.28), 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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