BSMIX vs. PRNHX
BSMIX (iShares Russell Small/Mid-Cap Index Fund) and PRNHX (T. Rowe Price New Horizons Fund) are both mutual funds - BSMIX is a Small Cap Blend Equities fund managed by BlackRock, while PRNHX is a Mid Cap Growth Equities fund managed by T. Rowe Price. Over the past 10 years, BSMIX returned 12.24%/yr vs 15.01%/yr for PRNHX. Their correlation of 0.84 suggests significant overlap in exposure. BSMIX charges 0.12%/yr vs 0.75%/yr for PRNHX.
Performance
BSMIX vs. PRNHX - Performance Comparison
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Returns By Period
In the year-to-date period, BSMIX achieves a 20.43% return, which is significantly higher than PRNHX's 14.99% return. Over the past 10 years, BSMIX has underperformed PRNHX with an annualized return of 12.24%, while PRNHX has yielded a comparatively higher 15.01% annualized return.
BSMIX
- 1D
- 0.41%
- 1M
- 1.85%
- YTD
- 20.43%
- 6M
- 17.73%
- 1Y
- 36.62%
- 3Y*
- 19.16%
- 5Y*
- 7.63%
- 10Y*
- 12.24%
PRNHX
- 1D
- 0.07%
- 1M
- 0.41%
- YTD
- 14.99%
- 6M
- 12.04%
- 1Y
- 26.81%
- 3Y*
- 11.78%
- 5Y*
- -0.20%
- 10Y*
- 15.01%
BSMIX vs. PRNHX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BSMIX iShares Russell Small/Mid-Cap Index Fund | 20.43% | 11.92% | 12.04% | 17.15% | -18.39% | 18.00% | 20.28% | 27.62% | -10.22% | 16.75% |
PRNHX T. Rowe Price New Horizons Fund | 14.99% | 3.27% | 8.80% | 21.35% | -36.96% | 9.96% | 58.05% | 56.50% | 3.79% | 31.59% |
Correlation
The correlation between BSMIX and PRNHX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.95 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.90 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.88 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.84 |
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016 | 0.84 |
The correlation between BSMIX and PRNHX shifts across timeframes, from 0.84 (10 years) to 0.95 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
BSMIX vs. PRNHX — Risk / Return Rank
BSMIX
PRNHX
BSMIX vs. PRNHX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell Small/Mid-Cap Index Fund (BSMIX) and T. Rowe Price New Horizons Fund (PRNHX). 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.
| BSMIX | PRNHX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.76 | ||
| Sortino ratioReturn per unit of downside risk | +1.03 | ||
| Omega ratioGain probability vs. loss probability | 1.33 | 1.22 | +0.12 |
| Calmar ratioReturn relative to maximum drawdown | 3.77 | 1.95 | +1.82 |
| Martin ratioReturn relative to average drawdown | 14.22 | 7.44 | +6.78 |
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Drawdowns
BSMIX vs. PRNHX - Drawdown Comparison
The maximum BSMIX drawdown since its inception was -41.32%, smaller than the maximum PRNHX drawdown of -70.96%. Use the drawdown chart below to compare losses from any high point for BSMIX and PRNHX.
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Drawdown Indicators
| BSMIX | PRNHX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -41.32% | -70.96% | +29.64% |
Max Drawdown (1Y)Largest decline over 1 year | -9.39% | -13.12% | +3.73% |
Max Drawdown (3Y)Largest decline over 3 years | -25.49% | -26.65% | +1.16% |
Max Drawdown (5Y)Largest decline over 5 years | -28.33% | -48.37% | +20.04% |
Max Drawdown (10Y)Largest decline over 10 years | -41.32% | -48.37% | +7.05% |
Current DrawdownCurrent decline from peak | -1.17% | -11.42% | +10.25% |
Average DrawdownAverage peak-to-trough decline | -7.38% | -18.37% | +10.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.48% | 3.44% | -0.96% |
Volatility
BSMIX vs. PRNHX - Volatility Comparison
The current volatility for iShares Russell Small/Mid-Cap Index Fund (BSMIX) is 6.23%, while T. Rowe Price New Horizons Fund (PRNHX) has a volatility of 9.15%. This indicates that BSMIX experiences smaller price fluctuations and is considered to be less risky than PRNHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BSMIX | PRNHX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.23% | 9.15% | -2.92% |
Volatility (6M)Calculated over the trailing 6-month period | 13.56% | 17.25% | -3.69% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.89% | 21.03% | -3.14% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.29% | 24.82% | -3.53% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.73% | 22.94% | -1.21% |
BSMIX vs. PRNHX - Expense Ratio Comparison
BSMIX has a 0.12% expense ratio, which is lower than PRNHX's 0.75% expense ratio.
Dividends
BSMIX vs. PRNHX - Dividend Comparison
BSMIX's dividend yield for the trailing twelve months is around 2.40%, less than PRNHX's 10.31% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BSMIX iShares Russell Small/Mid-Cap Index Fund | 2.40% | 2.90% | 2.04% | 1.37% | 4.94% | 4.77% | 4.42% | 2.83% | 4.33% | 2.83% | 1.45% | 0.00% |
PRNHX T. Rowe Price New Horizons Fund | 10.31% | 11.85% | 9.82% | 0.00% | 4.72% | 17.09% | 13.67% | 23.46% | 13.94% | 8.27% | 5.77% | 7.72% |
Frequently Asked Questions
With a correlation of 0.95, BSMIX and PRNHX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
PRNHX has higher volatility (9.15%) compared to BSMIX (6.23%). In terms of maximum drawdown, BSMIX dropped -41.32% vs PRNHX's -70.96%.
BSMIX currently has the higher Sharpe Ratio (1.98 vs 1.22), 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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