OSTFX vs. SSSYX
Compare and contrast key facts about Osterweis Fund (OSTFX) and State Street Equity 500 Index Fund Class K (SSSYX).
OSTFX is managed by Osterweis. It was launched on Oct 1, 1993. SSSYX is a passively managed fund by State Street that tracks the performance of the S&P 500 Index. It was launched on Sep 17, 2014.
Performance
OSTFX vs. SSSYX - Performance Comparison
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OSTFX vs. SSSYX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OSTFX Osterweis Fund | -6.94% | 12.85% | 13.48% | 22.64% | -22.01% | 22.58% | 23.20% | 43.39% | -7.85% | 14.82% |
SSSYX State Street Equity 500 Index Fund Class K | -7.05% | 17.81% | 24.99% | 26.27% | -18.16% | 28.51% | 18.31% | 31.38% | -4.38% | 21.61% |
Returns By Period
The year-to-date returns for both stocks are quite close, with OSTFX having a -6.94% return and SSSYX slightly lower at -7.05%. Over the past 10 years, OSTFX has underperformed SSSYX with an annualized return of 10.76%, while SSSYX has yielded a comparatively higher 13.69% annualized return.
OSTFX
- 1D
- -0.27%
- 1M
- -9.09%
- YTD
- -6.94%
- 6M
- -3.70%
- 1Y
- 8.57%
- 3Y*
- 11.19%
- 5Y*
- 5.98%
- 10Y*
- 10.76%
SSSYX
- 1D
- -0.39%
- 1M
- -7.67%
- YTD
- -7.05%
- 6M
- -4.60%
- 1Y
- 14.40%
- 3Y*
- 17.15%
- 5Y*
- 11.37%
- 10Y*
- 13.69%
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OSTFX vs. SSSYX - Expense Ratio Comparison
OSTFX has a 0.95% expense ratio, which is higher than SSSYX's 0.02% expense ratio.
Return for Risk
OSTFX vs. SSSYX — Risk / Return Rank
OSTFX
SSSYX
OSTFX vs. SSSYX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Osterweis Fund (OSTFX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.
| OSTFX | SSSYX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.59 | 0.84 | -0.25 |
Sortino ratioReturn per unit of downside risk | 0.96 | 1.30 | -0.34 |
Omega ratioGain probability vs. loss probability | 1.13 | 1.20 | -0.07 |
Calmar ratioReturn relative to maximum drawdown | 0.69 | 1.06 | -0.36 |
Martin ratioReturn relative to average drawdown | 2.79 | 5.13 | -2.34 |
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
| OSTFX | SSSYX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.59 | 0.84 | -0.25 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.39 | 0.68 | -0.29 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.64 | 0.11 | +0.53 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.69 | 0.11 | +0.58 |
Correlation
The correlation between OSTFX and SSSYX is 0.93, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
OSTFX vs. SSSYX - Dividend Comparison
OSTFX's dividend yield for the trailing twelve months is around 6.43%, more than SSSYX's 1.55% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
OSTFX Osterweis Fund | 6.43% | 5.98% | 14.93% | 4.01% | 7.81% | 12.83% | 5.48% | 14.46% | 29.80% | 43.97% | 7.35% | 22.55% |
SSSYX State Street Equity 500 Index Fund Class K | 1.55% | 1.44% | 1.63% | 1.78% | 2.16% | 2.76% | 1.86% | 4.44% | 5.18% | 5.94% | 2.07% | 1.84% |
Drawdowns
OSTFX vs. SSSYX - Drawdown Comparison
The maximum OSTFX drawdown since its inception was -40.63%, smaller than the maximum SSSYX drawdown of -91.48%. Use the drawdown chart below to compare losses from any high point for OSTFX and SSSYX.
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Drawdown Indicators
| OSTFX | SSSYX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -40.63% | -91.48% | +50.85% |
Max Drawdown (1Y)Largest decline over 1 year | -10.06% | -12.10% | +2.04% |
Max Drawdown (5Y)Largest decline over 5 years | -27.62% | -24.49% | -3.13% |
Max Drawdown (10Y)Largest decline over 10 years | -32.54% | -91.48% | +58.94% |
Current DrawdownCurrent decline from peak | -10.06% | -8.88% | -1.18% |
Average DrawdownAverage peak-to-trough decline | -6.87% | -4.20% | -2.67% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.49% | 2.49% | 0.00% |
Volatility
OSTFX vs. SSSYX - Volatility Comparison
The current volatility for Osterweis Fund (OSTFX) is 3.92%, while State Street Equity 500 Index Fund Class K (SSSYX) has a volatility of 4.24%. This indicates that OSTFX experiences smaller price fluctuations and is considered to be less risky than SSSYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OSTFX | SSSYX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.92% | 4.24% | -0.32% |
Volatility (6M)Calculated over the trailing 6-month period | 8.47% | 9.08% | -0.61% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.37% | 18.10% | -2.73% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.60% | 16.85% | -1.25% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 16.76% | 124.43% | -107.67% |