IVSOX vs. OBMCX

Last updated Jun 24, 2026

IVSOX (Voya SmallCap Opportunities Portfolio) and OBMCX (Oberweis Micro Cap Fund) are both Small Cap Growth Equities funds. Over the past 10 years, IVSOX returned 11.61%/yr vs 22.47%/yr for OBMCX. A 0.78 correlation means they provide meaningful diversification when combined. IVSOX charges 0.85%/yr vs 1.48%/yr for OBMCX.

Performance

IVSOX vs. OBMCX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya SmallCap Opportunities Portfolio (IVSOX) and Oberweis Micro Cap Fund (OBMCX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IVSOX achieves a 24.11% return, which is significantly lower than OBMCX's 52.27% return. Over the past 10 years, IVSOX has underperformed OBMCX with an annualized return of 11.61%, while OBMCX has yielded a comparatively higher 22.47% annualized return.

IVSOX

• 1D: 0.59%
• 1M: 7.62%
• YTD: 24.11%
• 6M: 21.04%
• 1Y: 52.18%
• 3Y*: 23.47%
• 5Y*: 9.16%
• 10Y*: 11.61%

OBMCX

• 1D: 1.48%
• 1M: 8.34%
• YTD: 52.27%
• 6M: 47.81%
• 1Y: 81.13%
• 3Y*: 30.63%
• 5Y*: 20.28%
• 10Y*: 22.47%

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

IVSOX vs. OBMCX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IVSOX Voya SmallCap Opportunities Portfolio	24.11%	14.79%	18.89%	20.93%	-23.02%	4.78%	26.36%	25.77%	-16.03%	18.75%
OBMCX Oberweis Micro Cap Fund	52.27%	14.70%	22.82%	18.87%	-10.57%	53.20%	29.91%	21.94%	-12.04%	27.90%

Correlation

The correlation between IVSOX and OBMCX is 0.79, 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	0.79
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (10Y) Calculated over the trailing 10-year period	0.89
Correlation (All Time) Calculated using the full available price history since Jun 3, 1996	0.78

The correlation between IVSOX and OBMCX shifts across timeframes, from 0.78 (all time) to 0.89 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

IVSOX vs. OBMCX — Risk / Return Rank

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

IVSOX

IVSOX Risk / Return Rank: 78
IVSOX Sharpe Ratio Rank: 85
IVSOX Sortino Ratio Rank: 74
IVSOX Omega Ratio Rank: 68
IVSOX Calmar Ratio Rank: 81
IVSOX Martin Ratio Rank: 80

OBMCX

OBMCX Risk / Return Rank: 92
OBMCX Sharpe Ratio Rank: 96
OBMCX Sortino Ratio Rank: 87
OBMCX Omega Ratio Rank: 83
OBMCX Calmar Ratio Rank: 97
OBMCX Martin Ratio Rank: 98

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.

IVSOX vs. OBMCX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya SmallCap Opportunities Portfolio (IVSOX) and Oberweis Micro Cap Fund (OBMCX). 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.

	IVSOX	OBMCX	Difference
Sharpe ratio: Return per unit of total volatility	2.56	3.23	-0.67
Sortino ratio: Return per unit of downside risk	3.28	3.83	-0.56
Omega ratio: Gain probability vs. loss probability	1.42	1.50	-0.09
Calmar ratio: Return relative to maximum drawdown	3.54	6.77	-3.23
Martin ratio: Return relative to average drawdown	13.96	26.80	-12.84

IVSOX vs. OBMCX - Sharpe Ratio Comparison

The current IVSOX Sharpe Ratio is 2.56, which is comparable to the OBMCX Sharpe Ratio of 3.23. The chart below compares the historical Sharpe Ratios of IVSOX and OBMCX, 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

IVSOX vs. OBMCX - Drawdown Comparison

The maximum IVSOX drawdown since its inception was -74.77%, which is greater than OBMCX's maximum drawdown of -68.24%. Use the drawdown chart below to compare losses from any high point for IVSOX and OBMCX.

Drawdown Indicators

	IVSOX	OBMCX	Difference
Max Drawdown Largest peak-to-trough decline	-74.77%	-68.24%	-6.53%
Max Drawdown (1Y) Largest decline over 1 year	-17.04%	-12.45%	-4.59%
Max Drawdown (3Y) Largest decline over 3 years	-30.76%	-28.11%	-2.65%
Max Drawdown (5Y) Largest decline over 5 years	-34.13%	-28.11%	-6.02%
Max Drawdown (10Y) Largest decline over 10 years	-41.90%	-50.04%	+8.14%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-25.87%	-16.39%	-9.48%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.16%	3.14%	+1.02%

Volatility

IVSOX vs. OBMCX - Volatility Comparison

The current volatility for Voya SmallCap Opportunities Portfolio (IVSOX) is 8.08%, while Oberweis Micro Cap Fund (OBMCX) has a volatility of 10.03%. This indicates that IVSOX experiences smaller price fluctuations and is considered to be less risky than OBMCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IVSOX	OBMCX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.08%	10.03%	-1.95%
Volatility (6M) Calculated over the trailing 6-month period	18.45%	20.16%	-1.71%
Volatility (1Y) Calculated over the trailing 1-year period	23.62%	26.14%	-2.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.37%	26.41%	-2.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.06%	26.01%	-1.95%

IVSOX vs. OBMCX - Expense Ratio Comparison

IVSOX has a 0.85% expense ratio, which is lower than OBMCX's 1.48% expense ratio.

Dividends

IVSOX vs. OBMCX - Dividend Comparison

IVSOX's dividend yield for the trailing twelve months is around 1.89%, more than OBMCX's 0.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IVSOX Voya SmallCap Opportunities Portfolio	1.89%	2.34%	0.66%	0.00%	26.68%	10.12%	0.36%	13.66%	22.36%	5.60%	8.58%	11.10%
OBMCX Oberweis Micro Cap Fund	0.93%	1.41%	2.53%	0.00%	1.37%	24.35%	0.00%	0.00%	19.67%	11.76%	0.05%	3.07%

Frequently Asked Questions

Can I hold both IVSOX and OBMCX in my portfolio?

IVSOX and OBMCX have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IVSOX or OBMCX?

OBMCX has higher volatility (10.03%) compared to IVSOX (8.08%). In terms of maximum drawdown, IVSOX dropped -74.77% vs OBMCX's -68.24%.

Which has better risk-adjusted returns?

OBMCX currently has the higher Sharpe Ratio (3.23 vs 2.56), 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.