OISGX vs. VSGIX

Last updated Jun 26, 2026

OISGX (Optimum Small-Mid Cap Growth Fund) and VSGIX (Vanguard Small-Cap Growth Index Fund Institutional Shares) are both Small Cap Growth Equities funds. Over the past 10 years, OISGX returned 13.93%/yr vs 12.10%/yr for VSGIX. With a 0.97 correlation, they move nearly in lockstep. OISGX charges 1.29%/yr vs 0.06%/yr for VSGIX.

Performance

OISGX vs. VSGIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Optimum Small-Mid Cap Growth Fund (OISGX) and Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with OISGX having a 16.81% return and VSGIX slightly higher at 17.55%. Over the past 10 years, OISGX has outperformed VSGIX with an annualized return of 13.93%, while VSGIX has yielded a comparatively lower 12.10% annualized return.

OISGX

• 1D: 0.68%
• 1M: 2.90%
• YTD: 16.81%
• 6M: 14.25%
• 1Y: 33.52%
• 3Y*: 15.12%
• 5Y*: 4.07%
• 10Y*: 13.93%

VSGIX

• 1D: 0.57%
• 1M: 0.48%
• YTD: 17.55%
• 6M: 14.44%
• 1Y: 30.91%
• 3Y*: 17.82%
• 5Y*: 4.60%
• 10Y*: 12.10%

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

OISGX vs. VSGIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OISGX Optimum Small-Mid Cap Growth Fund	16.81%	9.56%	14.23%	13.92%	-28.00%	12.89%	57.04%	25.72%	-3.00%	27.59%
VSGIX Vanguard Small-Cap Growth Index Fund Institutional Shares	17.55%	8.44%	14.95%	23.07%	-28.39%	5.70%	35.29%	32.77%	-5.70%	21.94%

Correlation

The correlation between OISGX and VSGIX is 0.97 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.97
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.97
Correlation (All Time) Calculated using the full available price history since Jul 23, 2003	0.97

The correlation between OISGX and VSGIX has been stable across timeframes, ranging from 0.96 to 0.97 - a consistent structural relationship.

Return for Risk

OISGX vs. VSGIX — Risk / Return Rank

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

OISGX

OISGX Risk / Return Rank: 42
OISGX Sharpe Ratio Rank: 42
OISGX Sortino Ratio Rank: 41
OISGX Omega Ratio Rank: 38
OISGX Calmar Ratio Rank: 41
OISGX Martin Ratio Rank: 46

VSGIX

VSGIX Risk / Return Rank: 43
VSGIX Sharpe Ratio Rank: 35
VSGIX Sortino Ratio Rank: 34
VSGIX Omega Ratio Rank: 31
VSGIX Calmar Ratio Rank: 60
VSGIX Martin Ratio Rank: 56

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.

OISGX vs. VSGIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Optimum Small-Mid Cap Growth Fund (OISGX) and Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX). 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.

	OISGX	VSGIX	Difference
Sharpe ratio: Return per unit of total volatility	1.54	1.45	+0.09
Sortino ratio: Return per unit of downside risk	2.19	2.05	+0.14
Omega ratio: Gain probability vs. loss probability	1.27	1.25	+0.02
Calmar ratio: Return relative to maximum drawdown	2.10	2.59	-0.49
Martin ratio: Return relative to average drawdown	8.15	9.69	-1.54

OISGX vs. VSGIX - Sharpe Ratio Comparison

The current OISGX Sharpe Ratio is 1.54, which is comparable to the VSGIX Sharpe Ratio of 1.45. The chart below compares the historical Sharpe Ratios of OISGX and VSGIX, 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

OISGX vs. VSGIX - Drawdown Comparison

The maximum OISGX drawdown since its inception was -62.75%, which is greater than VSGIX's maximum drawdown of -58.66%. Use the drawdown chart below to compare losses from any high point for OISGX and VSGIX.

Drawdown Indicators

	OISGX	VSGIX	Difference
Max Drawdown Largest peak-to-trough decline	-62.75%	-58.66%	-4.09%
Max Drawdown (1Y) Largest decline over 1 year	-15.52%	-11.38%	-4.14%
Max Drawdown (3Y) Largest decline over 3 years	-29.82%	-27.47%	-2.35%
Max Drawdown (5Y) Largest decline over 5 years	-35.63%	-38.36%	+2.73%
Max Drawdown (10Y) Largest decline over 10 years	-39.22%	-38.70%	-0.52%
Current Drawdown Current decline from peak	-1.17%	-1.01%	-0.16%
Average Drawdown Average peak-to-trough decline	-12.23%	-11.31%	-0.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.99%	3.04%	+0.95%

Volatility

OISGX vs. VSGIX - Volatility Comparison

Optimum Small-Mid Cap Growth Fund (OISGX) and Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX) have volatilities of 7.30% and 7.08%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OISGX	VSGIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.30%	7.08%	+0.22%
Volatility (6M) Calculated over the trailing 6-month period	16.51%	15.77%	+0.74%
Volatility (1Y) Calculated over the trailing 1-year period	21.18%	20.35%	+0.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.30%	23.71%	-0.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.45%	23.03%	+0.42%

OISGX vs. VSGIX - Expense Ratio Comparison

OISGX has a 1.29% expense ratio, which is higher than VSGIX's 0.06% expense ratio.

Dividends

OISGX vs. VSGIX - Dividend Comparison

OISGX's dividend yield for the trailing twelve months is around 2.27%, more than VSGIX's 0.45% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OISGX Optimum Small-Mid Cap Growth Fund	2.27%	2.65%	0.00%	0.00%	8.92%	32.79%	15.04%	9.33%	24.93%	4.21%	0.00%	15.87%
VSGIX Vanguard Small-Cap Growth Index Fund Institutional Shares	0.45%	0.55%	0.55%	0.68%	0.56%	0.37%	0.45%	0.58%	0.80%	0.82%	1.09%	0.98%

Frequently Asked Questions

Can I hold both OISGX and VSGIX in my portfolio?

With a correlation of 0.97, OISGX and VSGIX 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, OISGX or VSGIX?

OISGX has higher volatility (7.30%) compared to VSGIX (7.08%). In terms of maximum drawdown, OISGX dropped -62.75% vs VSGIX's -58.66%.

Which has better risk-adjusted returns?

OISGX currently has the higher Sharpe Ratio (1.54 vs 1.45), 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.