OILGX vs. VIGIX

Last updated Jun 25, 2026

OILGX (Optimum Large Cap Growth Fund) and VIGIX (Vanguard Growth Index Fund Institutional Shares) are both Large Cap Growth Equities funds. Over the past 10 years, OILGX returned 17.18%/yr vs 18.03%/yr for VIGIX. With a 0.98 correlation, they move nearly in lockstep. OILGX charges 0.89%/yr vs 0.04%/yr for VIGIX.

Performance

OILGX vs. VIGIX - Performance Comparison

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

Returns By Period

In the year-to-date period, OILGX achieves a 3.05% return, which is significantly lower than VIGIX's 3.54% return. Both investments have delivered pretty close results over the past 10 years, with OILGX having a 17.18% annualized return and VIGIX not far ahead at 18.03%.

OILGX

• 1D: -2.03%
• 1M: -3.50%
• YTD: 3.05%
• 6M: 1.46%
• 1Y: 17.55%
• 3Y*: 25.92%
• 5Y*: 11.98%
• 10Y*: 17.18%

VIGIX

• 1D: -2.09%
• 1M: -3.95%
• YTD: 3.54%
• 6M: 2.05%
• 1Y: 18.32%
• 3Y*: 22.75%
• 5Y*: 12.80%
• 10Y*: 18.03%

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

OILGX vs. VIGIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OILGX Optimum Large Cap Growth Fund	3.05%	15.97%	49.90%	41.16%	-34.69%	17.88%	33.81%	31.34%	-0.80%	32.46%
VIGIX Vanguard Growth Index Fund Institutional Shares	3.54%	19.44%	32.68%	46.77%	-33.13%	27.27%	40.19%	37.26%	-3.34%	27.81%

Correlation

The correlation between OILGX and VIGIX is 0.99 - 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	0.99
Correlation (3Y) Calculated over the trailing 3-year period	0.97
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (10Y) Calculated over the trailing 10-year period	0.98
Correlation (All Time) Calculated using the full available price history since Jul 23, 2003	0.98

The correlation between OILGX and VIGIX has been stable across timeframes, ranging from 0.97 to 0.99 - a consistent structural relationship.

Return for Risk

OILGX vs. VIGIX — Risk / Return Rank

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

OILGX

OILGX Risk / Return Rank: 19
OILGX Sharpe Ratio Rank: 20
OILGX Sortino Ratio Rank: 19
OILGX Omega Ratio Rank: 19
OILGX Calmar Ratio Rank: 16
OILGX Martin Ratio Rank: 19

VIGIX

VIGIX Risk / Return Rank: 18
VIGIX Sharpe Ratio Rank: 21
VIGIX Sortino Ratio Rank: 19
VIGIX Omega Ratio Rank: 20
VIGIX Calmar Ratio Rank: 15
VIGIX Martin Ratio Rank: 17

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.

OILGX vs. VIGIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Optimum Large Cap Growth Fund (OILGX) and Vanguard Growth Index Fund Institutional Shares (VIGIX). 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.

	OILGX	VIGIX	Difference
Sharpe ratio: Return per unit of total volatility	1.14	1.19	-0.04
Sortino ratio: Return per unit of downside risk	1.61	1.66	-0.05
Omega ratio: Gain probability vs. loss probability	1.20	1.21	-0.01
Calmar ratio: Return relative to maximum drawdown	1.26	1.22	+0.04
Martin ratio: Return relative to average drawdown	4.33	4.17	+0.16

OILGX vs. VIGIX - Sharpe Ratio Comparison

The current OILGX Sharpe Ratio is 1.14, which is comparable to the VIGIX Sharpe Ratio of 1.19. The chart below compares the historical Sharpe Ratios of OILGX and VIGIX, 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

OILGX vs. VIGIX - Drawdown Comparison

The maximum OILGX drawdown since its inception was -54.28%, roughly equal to the maximum VIGIX drawdown of -56.95%. Use the drawdown chart below to compare losses from any high point for OILGX and VIGIX.

Drawdown Indicators

	OILGX	VIGIX	Difference
Max Drawdown Largest peak-to-trough decline	-54.28%	-56.95%	+2.67%
Max Drawdown (1Y) Largest decline over 1 year	-15.31%	-16.51%	+1.20%
Max Drawdown (3Y) Largest decline over 3 years	-23.75%	-23.03%	-0.72%
Max Drawdown (5Y) Largest decline over 5 years	-39.97%	-35.62%	-4.35%
Max Drawdown (10Y) Largest decline over 10 years	-39.97%	-35.62%	-4.35%
Current Drawdown Current decline from peak	-6.63%	-6.84%	+0.21%
Average Drawdown Average peak-to-trough decline	-8.47%	-16.25%	+7.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.46%	4.82%	-0.36%

Volatility

OILGX vs. VIGIX - Volatility Comparison

The current volatility for Optimum Large Cap Growth Fund (OILGX) is 6.42%, while Vanguard Growth Index Fund Institutional Shares (VIGIX) has a volatility of 6.88%. This indicates that OILGX experiences smaller price fluctuations and is considered to be less risky than VIGIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OILGX	VIGIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.42%	6.88%	-0.46%
Volatility (6M) Calculated over the trailing 6-month period	13.11%	13.48%	-0.37%
Volatility (1Y) Calculated over the trailing 1-year period	16.96%	16.99%	-0.03%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.54%	22.51%	+1.03%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.07%	21.65%	+0.42%

OILGX vs. VIGIX - Expense Ratio Comparison

OILGX has a 0.89% expense ratio, which is higher than VIGIX's 0.04% expense ratio.

Dividends

OILGX vs. VIGIX - Dividend Comparison

OILGX's dividend yield for the trailing twelve months is around 13.63%, more than VIGIX's 0.39% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OILGX Optimum Large Cap Growth Fund	13.63%	14.05%	20.62%	11.50%	4.95%	14.42%	7.72%	2.98%	14.76%	18.13%	3.68%	10.49%
VIGIX Vanguard Growth Index Fund Institutional Shares	0.39%	0.41%	0.47%	0.58%	0.70%	0.48%	0.66%	0.95%	1.32%	1.15%	1.40%	1.31%

Frequently Asked Questions

Can I hold both OILGX and VIGIX in my portfolio?

With a correlation of 0.99, OILGX and VIGIX 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, OILGX or VIGIX?

VIGIX has higher volatility (6.88%) compared to OILGX (6.42%). In terms of maximum drawdown, OILGX dropped -54.28% vs VIGIX's -56.95%.

Which has better risk-adjusted returns?

VIGIX currently has the higher Sharpe Ratio (1.19 vs 1.14), 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.