OILGX vs. WLGAX

Last updated Jun 23, 2026

OILGX (Optimum Large Cap Growth Fund) and WLGAX (Delaware Ivy Large Cap Growth Fund) are both Large Cap Growth Equities funds from Delaware Funds. Over the past 10 years, OILGX returned 17.19%/yr vs 15.95%/yr for WLGAX. With a 0.95 correlation, they move nearly in lockstep. Both charge a 0.89% expense ratio.

Performance

OILGX vs. WLGAX - Performance Comparison

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

Returns By Period

In the year-to-date period, OILGX achieves a 6.27% return, which is significantly higher than WLGAX's -1.32% return. Over the past 10 years, OILGX has outperformed WLGAX with an annualized return of 17.19%, while WLGAX has yielded a comparatively lower 15.95% annualized return.

OILGX

• 1D: 1.42%
• 1M: -0.49%
• YTD: 6.27%
• 6M: 5.55%
• 1Y: 24.37%
• 3Y*: 26.88%
• 5Y*: 13.18%
• 10Y*: 17.19%

WLGAX

• 1D: 1.29%
• 1M: -1.53%
• YTD: -1.32%
• 6M: -1.21%
• 1Y: 8.23%
• 3Y*: 14.14%
• 5Y*: 9.66%
• 10Y*: 15.95%

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

OILGX vs. WLGAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OILGX Optimum Large Cap Growth Fund	6.27%	15.97%	49.90%	41.16%	-34.69%	17.88%	33.81%	31.34%	-0.80%	32.46%
WLGAX Delaware Ivy Large Cap Growth Fund	-1.32%	8.89%	25.97%	37.78%	-27.04%	29.95%	30.75%	36.52%	2.37%	29.02%

Correlation

The correlation between OILGX and WLGAX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jul 23, 2003	0.96

The correlation between OILGX and WLGAX has been stable across timeframes, ranging from 0.91 to 0.95 - a consistent structural relationship.

Return for Risk

OILGX vs. WLGAX — Risk / Return Rank

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

OILGX

OILGX Risk / Return Rank: 25
OILGX Sharpe Ratio Rank: 28
OILGX Sortino Ratio Rank: 25
OILGX Omega Ratio Rank: 26
OILGX Calmar Ratio Rank: 21
OILGX Martin Ratio Rank: 24

WLGAX

WLGAX Risk / Return Rank: 6
WLGAX Sharpe Ratio Rank: 7
WLGAX Sortino Ratio Rank: 7
WLGAX Omega Ratio Rank: 7
WLGAX Calmar Ratio Rank: 5
WLGAX Martin Ratio Rank: 6

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. WLGAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Optimum Large Cap Growth Fund (OILGX) and Delaware Ivy Large Cap Growth Fund (WLGAX). 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	WLGAX	Difference
Sharpe ratio: Return per unit of total volatility	1.42	0.52	+0.90
Sortino ratio: Return per unit of downside risk	1.95	0.79	+1.17
Omega ratio: Gain probability vs. loss probability	1.25	1.10	+0.15
Calmar ratio: Return relative to maximum drawdown	1.55	0.42	+1.13
Martin ratio: Return relative to average drawdown	5.36	1.27	+4.09

OILGX vs. WLGAX - Sharpe Ratio Comparison

The current OILGX Sharpe Ratio is 1.42, which is higher than the WLGAX Sharpe Ratio of 0.52. The chart below compares the historical Sharpe Ratios of OILGX and WLGAX, 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. WLGAX - Drawdown Comparison

The maximum OILGX drawdown since its inception was -54.28%, which is greater than WLGAX's maximum drawdown of -49.78%. Use the drawdown chart below to compare losses from any high point for OILGX and WLGAX.

Drawdown Indicators

	OILGX	WLGAX	Difference
Max Drawdown Largest peak-to-trough decline	-54.28%	-49.78%	-4.50%
Max Drawdown (1Y) Largest decline over 1 year	-15.31%	-18.12%	+2.81%
Max Drawdown (3Y) Largest decline over 3 years	-23.75%	-19.31%	-4.44%
Max Drawdown (5Y) Largest decline over 5 years	-39.97%	-37.00%	-2.97%
Max Drawdown (10Y) Largest decline over 10 years	-39.97%	-37.00%	-2.97%
Current Drawdown Current decline from peak	-3.71%	-4.43%	+0.72%
Average Drawdown Average peak-to-trough decline	-8.47%	-13.11%	+4.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.43%	6.07%	-1.64%

Volatility

OILGX vs. WLGAX - Volatility Comparison

Optimum Large Cap Growth Fund (OILGX) has a higher volatility of 6.14% compared to Delaware Ivy Large Cap Growth Fund (WLGAX) at 5.70%. This indicates that OILGX's price experiences larger fluctuations and is considered to be riskier than WLGAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OILGX	WLGAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.14%	5.70%	+0.44%
Volatility (6M) Calculated over the trailing 6-month period	13.11%	12.27%	+0.84%
Volatility (1Y) Calculated over the trailing 1-year period	16.80%	14.84%	+1.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.51%	20.71%	+2.80%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.09%	20.73%	+1.36%

OILGX vs. WLGAX - Expense Ratio Comparison

Both OILGX and WLGAX have an expense ratio of 0.89%.

Dividends

OILGX vs. WLGAX - Dividend Comparison

OILGX's dividend yield for the trailing twelve months is around 13.22%, more than WLGAX's 8.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OILGX Optimum Large Cap Growth Fund	13.22%	14.05%	20.62%	11.50%	4.95%	14.42%	7.72%	2.98%	14.76%	18.13%	3.68%	10.49%
WLGAX Delaware Ivy Large Cap Growth Fund	8.52%	8.41%	3.31%	3.07%	12.91%	9.68%	6.56%	12.84%	14.16%	4.45%	5.19%	6.43%

Frequently Asked Questions

Can I hold both OILGX and WLGAX in my portfolio?

With a correlation of 0.91, OILGX and WLGAX 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 WLGAX?

OILGX has higher volatility (6.14%) compared to WLGAX (5.70%). In terms of maximum drawdown, OILGX dropped -54.28% vs WLGAX's -49.78%.

Which has better risk-adjusted returns?

OILGX currently has the higher Sharpe Ratio (1.42 vs 0.52), 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.