IVSOX vs. WMKSX

Last updated Jun 4, 2026

IVSOX (Voya SmallCap Opportunities Portfolio) and WMKSX (WesMark Small Company Fund) are both Small Cap Growth Equities funds. Over the past 10 years, IVSOX returned 10.65%/yr vs 13.28%/yr for WMKSX. Their correlation of 0.86 suggests significant overlap in exposure. IVSOX charges 0.85%/yr vs 1.24%/yr for WMKSX.

Performance

IVSOX vs. WMKSX - Performance Comparison

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

Returns By Period

In the year-to-date period, IVSOX achieves a 18.35% return, which is significantly higher than WMKSX's 15.68% return. Over the past 10 years, IVSOX has underperformed WMKSX with an annualized return of 10.65%, while WMKSX has yielded a comparatively higher 13.28% annualized return.

IVSOX

• 1D: 1.15%
• 1M: 6.09%
• YTD: 18.35%
• 6M: 17.45%
• 1Y: 47.28%
• 3Y*: 21.74%
• 5Y*: 8.76%
• 10Y*: 10.65%

WMKSX

• 1D: 0.60%
• 1M: 2.80%
• YTD: 15.68%
• 6M: 13.63%
• 1Y: 31.01%
• 3Y*: 23.77%
• 5Y*: 10.53%
• 10Y*: 13.28%

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

IVSOX vs. WMKSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IVSOX Voya SmallCap Opportunities Portfolio	18.35%	14.79%	18.89%	20.93%	-23.02%	4.78%	26.36%	25.77%	-16.03%	18.75%
WMKSX WesMark Small Company Fund	15.68%	16.19%	22.12%	19.42%	-20.72%	22.81%	36.78%	20.32%	-13.92%	13.21%

Correlation

The correlation between IVSOX and WMKSX is 0.82, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.89
Correlation (10Y) Calculated over the trailing 10-year period	0.91
Correlation (All Time) Calculated using the full available price history since Jun 1, 1994	0.86

The correlation between IVSOX and WMKSX has been stable across timeframes, ranging from 0.82 to 0.91 - a consistent structural relationship.

Return for Risk

IVSOX vs. WMKSX — Risk / Return Rank

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

IVSOX

IVSOX Risk / Return Rank: 63
IVSOX Sharpe Ratio Rank: 69
IVSOX Sortino Ratio Rank: 57
IVSOX Omega Ratio Rank: 53
IVSOX Calmar Ratio Rank: 69
IVSOX Martin Ratio Rank: 65

WMKSX

WMKSX Risk / Return Rank: 54
WMKSX Sharpe Ratio Rank: 42
WMKSX Sortino Ratio Rank: 40
WMKSX Omega Ratio Rank: 37
WMKSX Calmar Ratio Rank: 84
WMKSX Martin Ratio Rank: 69

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. WMKSX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya SmallCap Opportunities Portfolio (IVSOX) and WesMark Small Company Fund (WMKSX). 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.

	IVSOX	WMKSX	Difference
Sharpe ratio: Return per unit of total volatility	2.45	1.90	+0.54
Sortino ratio: Return per unit of downside risk	3.19	2.68	+0.51
Omega ratio: Gain probability vs. loss probability	1.40	1.32	+0.08
Calmar ratio: Return relative to maximum drawdown	3.23	3.96	-0.73
Martin ratio: Return relative to average drawdown	12.83	13.23	-0.40
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IVSOX vs. WMKSX - Sharpe Ratio Comparison

The current IVSOX Sharpe Ratio is 2.45, which is comparable to the WMKSX Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of IVSOX and WMKSX, 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

	IVSOX	WMKSX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.45	1.90	+0.54
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.37	0.41	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.56	-0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	0.37	+0.01

Drawdowns

IVSOX vs. WMKSX - Drawdown Comparison

The maximum IVSOX drawdown since its inception was -74.77%, which is greater than WMKSX's maximum drawdown of -64.09%. Use the drawdown chart below to compare losses from any high point for IVSOX and WMKSX.

Drawdown Indicators

	IVSOX	WMKSX	Difference
Max Drawdown Largest peak-to-trough decline	-74.77%	-64.09%	-10.68%
Max Drawdown (1Y) Largest decline over 1 year	-17.04%	-8.50%	-8.54%
Max Drawdown (3Y) Largest decline over 3 years	-30.76%	-24.20%	-6.56%
Max Drawdown (5Y) Largest decline over 5 years	-34.13%	-39.84%	+5.71%
Max Drawdown (10Y) Largest decline over 10 years	-41.90%	-39.84%	-2.06%
Current Drawdown Current decline from peak	-0.45%	-0.35%	-0.10%
Average Drawdown Average peak-to-trough decline	-25.92%	-15.68%	-10.24%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.14%	2.54%	+1.60%

Volatility

IVSOX vs. WMKSX - Volatility Comparison

Voya SmallCap Opportunities Portfolio (IVSOX) has a higher volatility of 6.72% compared to WesMark Small Company Fund (WMKSX) at 4.76%. This indicates that IVSOX's price experiences larger fluctuations and is considered to be riskier than WMKSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IVSOX	WMKSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.72%	4.76%	+1.96%
Volatility (6M) Calculated over the trailing 6-month period	17.44%	12.05%	+5.39%
Volatility (1Y) Calculated over the trailing 1-year period	22.53%	17.71%	+4.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.17%	26.10%	-1.93%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.96%	23.97%	-0.01%

IVSOX vs. WMKSX - Expense Ratio Comparison

IVSOX has a 0.85% expense ratio, which is lower than WMKSX's 1.24% expense ratio.

Dividends

IVSOX vs. WMKSX - Dividend Comparison

IVSOX's dividend yield for the trailing twelve months is around 1.98%, less than WMKSX's 19.80% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IVSOX Voya SmallCap Opportunities Portfolio	1.98%	2.34%	0.66%	0.00%	26.68%	10.12%	0.36%	13.66%	22.36%	5.60%	8.58%	11.10%
WMKSX WesMark Small Company Fund	19.80%	22.91%	4.69%	5.93%	6.23%	25.75%	8.21%	0.00%	12.53%	8.59%	5.26%	6.57%

Frequently Asked Questions

Can I hold both IVSOX and WMKSX in my portfolio?

IVSOX and WMKSX have a correlation of 0.82, 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 WMKSX?

IVSOX has higher volatility (6.72%) compared to WMKSX (4.76%). In terms of maximum drawdown, IVSOX dropped -74.77% vs WMKSX's -64.09%.

Which has better risk-adjusted returns?

IVSOX currently has the higher Sharpe Ratio (2.45 vs 1.90), 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.