NESIX vs. OSTGX

Last updated Apr 2, 2026

Compare and contrast key facts about Needham Small Cap Growth Fund Institutional (NESIX) and Osterweis Emerging Opportunity Fund (OSTGX).

NESIX is managed by Needham. It was launched on Dec 30, 2016. OSTGX is managed by Osterweis. It was launched on Nov 30, 2016.

Performance

NESIX vs. OSTGX - Performance Comparison

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

NESIX vs. OSTGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NESIX Needham Small Cap Growth Fund Institutional	15.52%	11.16%	13.47%	5.85%	-29.71%	11.36%	73.06%	55.28%	-4.87%	12.63%
OSTGX Osterweis Emerging Opportunity Fund	-3.78%	0.26%	22.49%	23.98%	-33.00%	-14.83%	83.54%	36.97%	1.33%	26.50%

Returns By Period

In the year-to-date period, NESIX achieves a 15.52% return, which is significantly higher than OSTGX's -3.78% return.

NESIX

• 1D: 5.37%
• 1M: -3.69%
• YTD: 15.52%
• 6M: 15.78%
• 1Y: 56.14%
• 3Y*: 13.44%
• 5Y*: 1.70%
• 10Y*: —

OSTGX

• 1D: 4.82%
• 1M: -6.80%
• YTD: -3.78%
• 6M: -0.53%
• 1Y: 12.34%
• 3Y*: 10.02%
• 5Y*: -3.91%
• 10Y*: —

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

NESIX vs. OSTGX - Expense Ratio Comparison

NESIX has a 1.18% expense ratio, which is higher than OSTGX's 1.17% expense ratio.

NESIX

Needham Small Cap Growth Fund Institutional

OSTGX

Osterweis Emerging Opportunity Fund

Return for Risk

NESIX vs. OSTGX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

NESIX

NESIX Risk / Return Rank: 84
NESIX Sharpe Ratio Rank: 82
NESIX Sortino Ratio Rank: 81
NESIX Omega Ratio Rank: 73
NESIX Calmar Ratio Rank: 93
NESIX Martin Ratio Rank: 90

OSTGX

OSTGX Risk / Return Rank: 21
OSTGX Sharpe Ratio Rank: 17
OSTGX Sortino Ratio Rank: 20
OSTGX Omega Ratio Rank: 17
OSTGX Calmar Ratio Rank: 27
OSTGX Martin Ratio Rank: 25

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

NESIX vs. OSTGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Needham Small Cap Growth Fund Institutional (NESIX) and Osterweis Emerging Opportunity Fund (OSTGX). 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.

	NESIX	OSTGX	Difference
Sharpe ratio Return per unit of total volatility	1.61	0.54	+1.07
Sortino ratio Return per unit of downside risk	2.20	0.94	+1.26
Omega ratio Gain probability vs. loss probability	1.29	1.12	+0.17
Calmar ratio Return relative to maximum drawdown	3.17	0.92	+2.24
Martin ratio Return relative to average drawdown	10.66	3.11	+7.55
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NESIX vs. OSTGX - Sharpe Ratio Comparison

The current NESIX Sharpe Ratio is 1.61, which is higher than the OSTGX Sharpe Ratio of 0.54. The chart below compares the historical Sharpe Ratios of NESIX and OSTGX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	NESIX	OSTGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.61	0.54	+1.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.06	-0.16	+0.22
Sharpe Ratio (All Time) Calculated using the full available price history	0.55	0.45	+0.10

Correlation

The correlation between NESIX and OSTGX is 0.80, 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

NESIX vs. OSTGX - Dividend Comparison

NESIX has not paid dividends to shareholders, while OSTGX's dividend yield for the trailing twelve months is around 2.40%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
NESIX Needham Small Cap Growth Fund Institutional	0.00%	0.00%	0.00%	0.00%	3.93%	23.92%	13.26%	8.25%	21.96%	8.89%
OSTGX Osterweis Emerging Opportunity Fund	2.40%	2.31%	0.84%	0.00%	0.00%	0.10%	10.54%	12.79%	8.06%	18.91%

Drawdowns

NESIX vs. OSTGX - Drawdown Comparison

The maximum NESIX drawdown since its inception was -49.61%, smaller than the maximum OSTGX drawdown of -53.93%. Use the drawdown chart below to compare losses from any high point for NESIX and OSTGX.

Drawdown Indicators

	NESIX	OSTGX	Difference
Max Drawdown Largest peak-to-trough decline	-49.61%	-53.93%	+4.32%
Max Drawdown (1Y) Largest decline over 1 year	-17.25%	-13.61%	-3.64%
Max Drawdown (5Y) Largest decline over 5 years	-49.61%	-53.93%	+4.32%
Current Drawdown Current decline from peak	-4.27%	-27.38%	+23.11%
Average Drawdown Average peak-to-trough decline	-15.26%	-19.78%	+4.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.13%	4.04%	+1.09%

Volatility

NESIX vs. OSTGX - Volatility Comparison

Needham Small Cap Growth Fund Institutional (NESIX) has a higher volatility of 12.19% compared to Osterweis Emerging Opportunity Fund (OSTGX) at 9.38%. This indicates that NESIX's price experiences larger fluctuations and is considered to be riskier than OSTGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NESIX	OSTGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.19%	9.38%	+2.81%
Volatility (6M) Calculated over the trailing 6-month period	23.47%	15.09%	+8.38%
Volatility (1Y) Calculated over the trailing 1-year period	35.37%	24.60%	+10.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	29.15%	24.68%	+4.47%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.35%	25.13%	+1.22%