OSTGX vs. IWO
OSTGX (Osterweis Emerging Opportunity Fund) and IWO (iShares Russell 2000 Growth ETF) are both Small Cap Growth Equities funds. Over the past 5 years, OSTGX returned 0.15%/yr vs 5.15%/yr for IWO. Their correlation of 0.89 suggests significant overlap in exposure. OSTGX charges 1.17%/yr vs 0.24%/yr for IWO.
Performance
OSTGX vs. IWO - Performance Comparison
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Returns By Period
In the year-to-date period, OSTGX achieves a 23.49% return, which is significantly higher than IWO's 20.20% return.
OSTGX
- 1D
- -0.57%
- 1M
- 8.45%
- YTD
- 23.49%
- 6M
- 20.72%
- 1Y
- 35.85%
- 3Y*
- 17.78%
- 5Y*
- 0.15%
- 10Y*
- —
IWO
- 1D
- -1.57%
- 1M
- 4.24%
- YTD
- 20.20%
- 6M
- 16.81%
- 1Y
- 39.68%
- 3Y*
- 19.15%
- 5Y*
- 5.15%
- 10Y*
- 12.01%
OSTGX vs. IWO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OSTGX Osterweis Emerging Opportunity Fund | 23.49% | 0.26% | 22.49% | 23.98% | -33.00% | -14.83% | 83.54% | 36.97% | 1.33% | 26.75% |
IWO iShares Russell 2000 Growth ETF | 20.20% | 12.90% | 15.04% | 18.51% | -26.27% | 2.54% | 34.68% | 28.48% | -9.43% | 22.25% |
Correlation
The correlation between OSTGX and IWO is 0.88, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.88 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.90 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.92 |
Correlation (All Time) Calculated using the full available price history since Nov 30, 2016 | 0.89 |
The correlation between OSTGX and IWO has been stable across timeframes, ranging from 0.88 to 0.92 - a consistent structural relationship.
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Return for Risk
OSTGX vs. IWO — Risk / Return Rank
OSTGX
IWO
OSTGX vs. IWO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Osterweis Emerging Opportunity Fund (OSTGX) and iShares Russell 2000 Growth ETF (IWO). 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.
| OSTGX | IWO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.10 | ||
| Sortino ratioReturn per unit of downside risk | -0.02 | ||
| Omega ratioGain probability vs. loss probability | 1.29 | 1.29 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 2.70 | 2.68 | +0.02 |
| Martin ratioReturn relative to average drawdown | 10.09 | 9.57 | +0.52 |
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Drawdowns
OSTGX vs. IWO - Drawdown Comparison
The maximum OSTGX drawdown since its inception was -53.93%, smaller than the maximum IWO drawdown of -60.11%. Use the drawdown chart below to compare losses from any high point for OSTGX and IWO.
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Drawdown Indicators
| OSTGX | IWO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.93% | -60.11% | +6.18% |
Max Drawdown (1Y)Largest decline over 1 year | -13.61% | -14.87% | +1.26% |
Max Drawdown (3Y)Largest decline over 3 years | -31.06% | -28.57% | -2.49% |
Max Drawdown (5Y)Largest decline over 5 years | -53.93% | -40.51% | -13.42% |
Max Drawdown (10Y)Largest decline over 10 years | — | -42.02% | — |
Current DrawdownCurrent decline from peak | -6.79% | -1.57% | -5.22% |
Average DrawdownAverage peak-to-trough decline | -19.69% | -16.68% | -3.01% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.63% | 4.16% | -0.53% |
Volatility
OSTGX vs. IWO - Volatility Comparison
Osterweis Emerging Opportunity Fund (OSTGX) and iShares Russell 2000 Growth ETF (IWO) have volatilities of 7.49% and 7.84%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OSTGX | IWO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 7.49% | 7.84% | -0.35% |
Volatility (6M)Calculated over the trailing 6-month period | 17.04% | 16.69% | +0.35% |
Volatility (1Y)Calculated over the trailing 1-year period | 21.66% | 22.20% | -0.54% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 24.84% | 24.65% | +0.19% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 25.15% | 24.18% | +0.97% |
OSTGX vs. IWO - Expense Ratio Comparison
OSTGX has a 1.17% expense ratio, which is higher than IWO's 0.24% expense ratio.
Dividends
OSTGX vs. IWO - Dividend Comparison
OSTGX's dividend yield for the trailing twelve months is around 1.87%, more than IWO's 0.42% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IWO iShares Russell 2000 Growth ETF | 0.42% | 0.56% | 0.80% | 0.73% | 0.73% | 0.32% | 0.44% | 0.71% | 0.76% | 0.73% | 0.97% | 0.89% |
OSTGX Osterweis Emerging Opportunity Fund | 1.87% | 2.31% | 0.84% | 0.00% | 0.00% | 0.10% | 10.54% | 12.79% | 8.06% | 18.91% | 0.00% | 0.00% |
Frequently Asked Questions
OSTGX and IWO have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IWO has higher volatility (7.84%) compared to OSTGX (7.49%). In terms of maximum drawdown, OSTGX dropped -53.93% vs IWO's -60.11%.
IWO currently has the higher Sharpe Ratio (1.80 vs 1.70), 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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