OSTGX vs. VISGX

Last updated Aug 1, 2026

OSTGX (Osterweis Emerging Opportunity Fund) and VISGX (Vanguard Small Cap Growth Index Fund) are both Small Cap Growth Equities funds. Over the past 5 years, OSTGX returned -0.60%/yr vs 4.02%/yr for VISGX. Their correlation of 0.91 means they have usually moved in the same direction. OSTGX charges 1.17%/yr vs 0.19%/yr for VISGX.

Performance

OSTGX vs. VISGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Osterweis Emerging Opportunity Fund (OSTGX) and Vanguard Small Cap Growth Index Fund (VISGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OSTGX achieves a 20.19% return, which is significantly higher than VISGX's 13.27% return.

OSTGX

• 1D: 2.00%
• 1M: -6.52%
• 6M: 16.48%
• YTD: 20.19%
• 1Y: 29.58%
• 3Y*: 14.70%
• 5Y*: -0.60%
• 10Y*: —
• ALL TIME*: 13.52%

VISGX

• 1D: 2.23%
• 1M: -4.70%
• 6M: 9.29%
• YTD: 13.27%
• 1Y: 23.41%
• 3Y*: 13.02%
• 5Y*: 4.02%
• 10Y*: 10.62%
• ALL TIME*: 9.03%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
OSTGX Osterweis Emerging Opportunity Fund	$0.00	$0.00	$0.00
VISGX Vanguard Small Cap Growth Index Fund	$0.00	$0.00	$0.00

OSTGX vs. VISGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OSTGX Osterweis Emerging Opportunity Fund	20.19%	0.26%	22.49%	23.98%	-33.00%	-14.83%	83.54%	36.97%	1.33%	26.75%
VISGX Vanguard Small Cap Growth Index Fund	13.27%	8.18%	14.80%	22.91%	-28.50%	5.58%	35.11%	32.60%	-5.81%	21.78%

Correlation

The correlation between OSTGX and VISGX is 0.90, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.90
Correlation (3Y) Balances recent behavior with more history.	0.92
Correlation (5Y) Shows whether the relationship held over a longer period.	0.93
Correlation (All Time) Calculated using the full available price history since Nov 30, 2016	0.91

The correlation between OSTGX and VISGX has been stable across timeframes, ranging from 0.90 to 0.93 - a consistent structural relationship.

Return for Risk

OSTGX vs. VISGX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

OSTGX

OSTGX Risk / Return Rank: 44
OSTGX Sharpe Ratio Rank: 39
OSTGX Sortino Ratio Rank: 42
OSTGX Omega Ratio Rank: 37
OSTGX Calmar Ratio Rank: 53
OSTGX Martin Ratio Rank: 47

VISGX

VISGX Risk / Return Rank: 36
VISGX Sharpe Ratio Rank: 30
VISGX Sortino Ratio Rank: 31
VISGX Omega Ratio Rank: 28
VISGX Calmar Ratio Rank: 47
VISGX Martin Ratio Rank: 42

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

OSTGX vs. VISGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Osterweis Emerging Opportunity Fund (OSTGX) and Vanguard Small Cap Growth Index Fund (VISGX). 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	VISGX	Difference
Sharpe ratio: Return per unit of total volatility	1.19	0.97	+0.22
Sortino ratio: Return per unit of downside risk	1.81	1.46	+0.35
Omega ratio: Gain probability vs. loss probability	1.21	1.17	+0.04
Calmar ratio: Return relative to maximum drawdown	1.94	1.76	+0.18
Martin ratio: Return relative to average drawdown	6.69	5.98	+0.71

OSTGX vs. VISGX - Sharpe Ratio Comparison

The current OSTGX Sharpe Ratio is 1.19, which is comparable to the VISGX Sharpe Ratio of 0.97. The chart below compares the historical Sharpe Ratios of OSTGX and VISGX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

OSTGX vs. VISGX - Drawdown Comparison

The maximum OSTGX drawdown since its inception was -53.93%, smaller than the maximum VISGX drawdown of -58.74%. Use the drawdown chart below to compare losses from any high point for OSTGX and VISGX.

Drawdown Indicators

	OSTGX	VISGX	Difference
Max Drawdown Largest peak-to-trough decline	-53.93%	-58.74%	+4.81%
Max Drawdown (1Y) Largest decline over 1 year	-13.61%	-11.39%	-2.22%
Max Drawdown (3Y) Largest decline over 3 years	-31.06%	-27.58%	-3.48%
Max Drawdown (5Y) Largest decline over 5 years	-53.93%	-38.41%	-15.52%
Max Drawdown (10Y) Largest decline over 10 years	—	-38.70%	—
Current Drawdown Current decline from peak	-9.29%	-6.66%	-2.63%
Average Drawdown Average peak-to-trough decline	-19.54%	-11.56%	-7.98%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.94%	3.36%	+0.58%

Volatility

OSTGX vs. VISGX - Volatility Comparison

Osterweis Emerging Opportunity Fund (OSTGX) has a higher volatility of 5.67% compared to Vanguard Small Cap Growth Index Fund (VISGX) at 5.23%. This indicates that OSTGX's price experiences larger fluctuations and is considered to be riskier than VISGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OSTGX	VISGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.67%	5.23%	+0.44%
Volatility (6M) Calculated over the trailing 6-month period	17.84%	16.14%	+1.70%
Volatility (1Y) Calculated over the trailing 1-year period	22.24%	20.70%	+1.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.89%	23.74%	+1.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.11%	23.03%	+2.08%

OSTGX vs. VISGX - Expense Ratio Comparison

OSTGX has a 1.17% expense ratio, which is higher than VISGX's 0.19% expense ratio.

Dividends

OSTGX vs. VISGX - Dividend Comparison

OSTGX's dividend yield for the trailing twelve months is around 1.92%, more than VISGX's 0.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OSTGX Osterweis Emerging Opportunity Fund	1.92%	2.31%	0.84%	0.00%	0.00%	0.10%	10.54%	12.79%	8.06%	18.91%	0.00%	0.00%
VISGX Vanguard Small Cap Growth Index Fund	0.33%	0.33%	0.42%	0.56%	0.46%	0.23%	0.35%	0.47%	0.65%	0.71%	0.97%	0.84%

Frequently Asked Questions

Can I hold both OSTGX and VISGX in my portfolio?

With a correlation of 0.90, OSTGX and VISGX 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.

Which is riskier, OSTGX or VISGX?

OSTGX has higher volatility (5.67%) compared to VISGX (5.23%). In terms of maximum drawdown, OSTGX dropped -53.93% vs VISGX's -58.74%.

Which has better risk-adjusted returns?

OSTGX currently has the higher Sharpe Ratio (1.19 vs 0.97), 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.