OBMCX vs. VONG

Last updated Jun 4, 2026

OBMCX (Oberweis Micro Cap Fund) and VONG (Vanguard Russell 1000 Growth ETF) are both funds - OBMCX is a Small Cap Growth Equities fund managed by Oberweis, while VONG is a Large Cap Growth Equities fund tracking the Russell 1000 Growth Index. Over the past 10 years, OBMCX returned 21.63%/yr vs 18.61%/yr for VONG. A 0.74 correlation means they provide meaningful diversification when combined. OBMCX charges 1.48%/yr vs 0.06%/yr for VONG.

Performance

OBMCX vs. VONG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oberweis Micro Cap Fund (OBMCX) and Vanguard Russell 1000 Growth ETF (VONG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OBMCX achieves a 45.67% return, which is significantly higher than VONG's 7.17% return. Over the past 10 years, OBMCX has outperformed VONG with an annualized return of 21.63%, while VONG has yielded a comparatively lower 18.61% annualized return.

OBMCX

• 1D: 2.91%
• 1M: 3.70%
• YTD: 45.67%
• 6M: 45.60%
• 1Y: 77.10%
• 3Y*: 29.76%
• 5Y*: 19.97%
• 10Y*: 21.63%

VONG

• 1D: -1.32%
• 1M: 5.68%
• YTD: 7.17%
• 6M: 6.52%
• 1Y: 25.74%
• 3Y*: 24.92%
• 5Y*: 15.38%
• 10Y*: 18.61%

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

OBMCX vs. VONG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OBMCX Oberweis Micro Cap Fund	45.67%	14.70%	22.82%	18.87%	-10.57%	53.20%	29.91%	21.94%	-12.04%	27.90%
VONG Vanguard Russell 1000 Growth ETF	7.17%	18.45%	33.20%	42.67%	-29.18%	27.60%	38.30%	36.06%	-1.53%	30.05%

Correlation

The correlation between OBMCX and VONG is 0.59, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.59
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.73
Correlation (10Y) Calculated over the trailing 10-year period	0.72
Correlation (All Time) Calculated using the full available price history since Sep 23, 2010	0.74

The correlation between OBMCX and VONG shifts across timeframes, from 0.59 (1 year) to 0.74 (all time), reflecting how their relationship changes across market environments.

Return for Risk

OBMCX vs. VONG — Risk / Return Rank

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

OBMCX

OBMCX Risk / Return Rank: 90
OBMCX Sharpe Ratio Rank: 94
OBMCX Sortino Ratio Rank: 83
OBMCX Omega Ratio Rank: 78
OBMCX Calmar Ratio Rank: 96
OBMCX Martin Ratio Rank: 97

VONG

VONG Risk / Return Rank: 41
VONG Sharpe Ratio Rank: 48
VONG Sortino Ratio Rank: 45
VONG Omega Ratio Rank: 45
VONG Calmar Ratio Rank: 32
VONG Martin Ratio Rank: 34

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.

OBMCX vs. VONG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oberweis Micro Cap Fund (OBMCX) and Vanguard Russell 1000 Growth ETF (VONG). 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.

	OBMCX	VONG	Difference
Sharpe ratio Return per unit of total volatility	3.24	1.68	+1.55
Sortino ratio Return per unit of downside risk	3.90	2.29	+1.61
Omega ratio Gain probability vs. loss probability	1.51	1.29	+0.22
Calmar ratio Return relative to maximum drawdown	6.47	1.59	+4.87
Martin ratio Return relative to average drawdown	25.98	5.34	+20.64
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OBMCX vs. VONG - Sharpe Ratio Comparison

The current OBMCX Sharpe Ratio is 3.24, which is higher than the VONG Sharpe Ratio of 1.68. The chart below compares the historical Sharpe Ratios of OBMCX and VONG, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	OBMCX	VONG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.24	1.68	+1.55
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.77	0.72	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.84	0.89	-0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.90	-0.45

Drawdowns

OBMCX vs. VONG - Drawdown Comparison

The maximum OBMCX drawdown since its inception was -68.24%, which is greater than VONG's maximum drawdown of -32.72%. Use the drawdown chart below to compare losses from any high point for OBMCX and VONG.

Drawdown Indicators

	OBMCX	VONG	Difference
Max Drawdown Largest peak-to-trough decline	-68.24%	-32.72%	-35.52%
Max Drawdown (1Y) Largest decline over 1 year	-12.45%	-16.23%	+3.78%
Max Drawdown (3Y) Largest decline over 3 years	-28.11%	-23.27%	-4.84%
Max Drawdown (5Y) Largest decline over 5 years	-28.11%	-32.72%	+4.61%
Max Drawdown (10Y) Largest decline over 10 years	-50.04%	-32.72%	-17.32%
Current Drawdown Current decline from peak	0.00%	-1.66%	+1.66%
Average Drawdown Average peak-to-trough decline	-16.42%	-4.88%	-11.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.09%	4.83%	-1.74%

Volatility

OBMCX vs. VONG - Volatility Comparison

Oberweis Micro Cap Fund (OBMCX) has a higher volatility of 8.26% compared to Vanguard Russell 1000 Growth ETF (VONG) at 3.60%. This indicates that OBMCX's price experiences larger fluctuations and is considered to be riskier than VONG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBMCX	VONG	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.26%	3.60%	+4.66%
Volatility (6M) Calculated over the trailing 6-month period	18.66%	11.61%	+7.05%
Volatility (1Y) Calculated over the trailing 1-year period	24.89%	15.37%	+9.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.20%	21.33%	+4.87%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.88%	20.87%	+5.01%

OBMCX vs. VONG - Expense Ratio Comparison

OBMCX has a 1.48% expense ratio, which is higher than VONG's 0.06% expense ratio.

Dividends

OBMCX vs. VONG - Dividend Comparison

OBMCX's dividend yield for the trailing twelve months is around 0.97%, more than VONG's 0.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OBMCX Oberweis Micro Cap Fund	0.97%	1.41%	2.53%	0.00%	1.37%	24.35%	0.00%	0.00%	19.67%	11.76%	0.05%	3.07%
VONG Vanguard Russell 1000 Growth ETF	0.43%	0.45%	0.55%	0.71%	0.98%	0.58%	0.77%	1.03%	1.18%	1.19%	1.48%	1.47%

Frequently Asked Questions

Can I hold both OBMCX and VONG in my portfolio?

OBMCX and VONG have a correlation of 0.59, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OBMCX or VONG?

OBMCX has higher volatility (8.26%) compared to VONG (3.60%). In terms of maximum drawdown, OBMCX dropped -68.24% vs VONG's -32.72%.

Which has better risk-adjusted returns?

OBMCX currently has the higher Sharpe Ratio (3.24 vs 1.68), 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.