OISGX vs. OILGX

Last updated Jun 4, 2026

OISGX (Optimum Small-Mid Cap Growth Fund) and OILGX (Optimum Large Cap Growth Fund) are both mutual funds - OISGX is a Small Cap Growth Equities fund managed by Delaware Funds, while OILGX is a Large Cap Growth Equities fund managed by Delaware Funds. Over the past 10 years, OISGX returned 13.41%/yr vs 17.39%/yr for OILGX. Their correlation of 0.87 suggests significant overlap in exposure. OISGX charges 1.29%/yr vs 0.89%/yr for OILGX.

Performance

OISGX vs. OILGX - Performance Comparison

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

Returns By Period

In the year-to-date period, OISGX achieves a 14.90% return, which is significantly higher than OILGX's 10.05% return. Over the past 10 years, OISGX has underperformed OILGX with an annualized return of 13.41%, while OILGX has yielded a comparatively higher 17.39% annualized return.

OISGX

• 1D: 0.81%
• 1M: 8.13%
• YTD: 14.90%
• 6M: 14.45%
• 1Y: 33.99%
• 3Y*: 14.97%
• 5Y*: 4.66%
• 10Y*: 13.41%

OILGX

• 1D: -0.29%
• 1M: 7.16%
• YTD: 10.05%
• 6M: 9.10%
• 1Y: 27.94%
• 3Y*: 29.54%
• 5Y*: 14.72%
• 10Y*: 17.39%

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

OISGX vs. OILGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OISGX Optimum Small-Mid Cap Growth Fund	14.90%	9.56%	14.23%	13.92%	-28.00%	12.89%	57.04%	25.72%	-3.00%	27.59%
OILGX Optimum Large Cap Growth Fund	10.05%	15.97%	49.90%	41.16%	-34.69%	17.88%	33.81%	31.34%	-0.80%	32.46%

Correlation

The correlation between OISGX and OILGX is 0.71, 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	0.71
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.81
Correlation (10Y) Calculated over the trailing 10-year period	0.82
Correlation (All Time) Calculated using the full available price history since Jul 24, 2003	0.87

The correlation between OISGX and OILGX shifts across timeframes, from 0.71 (1 year) to 0.87 (all time), reflecting how their relationship changes across market environments.

Return for Risk

OISGX vs. OILGX — Risk / Return Rank

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

OISGX

OISGX Risk / Return Rank: 38
OISGX Sharpe Ratio Rank: 37
OISGX Sortino Ratio Rank: 35
OISGX Omega Ratio Rank: 34
OISGX Calmar Ratio Rank: 38
OISGX Martin Ratio Rank: 43

OILGX

OILGX Risk / Return Rank: 32
OILGX Sharpe Ratio Rank: 38
OILGX Sortino Ratio Rank: 35
OILGX Omega Ratio Rank: 35
OILGX Calmar Ratio Rank: 26
OILGX Martin Ratio Rank: 28

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. OILGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Optimum Small-Mid Cap Growth Fund (OISGX) and Optimum Large Cap Growth Fund (OILGX). 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.

	OISGX	OILGX	Difference
Sharpe ratio: Return per unit of total volatility	1.78	1.80	-0.01
Sortino ratio: Return per unit of downside risk	2.49	2.45	+0.05
Omega ratio: Gain probability vs. loss probability	1.31	1.31	0.00
Calmar ratio: Return relative to maximum drawdown	2.34	1.88	+0.46
Martin ratio: Return relative to average drawdown	9.13	6.64	+2.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OISGX vs. OILGX - Sharpe Ratio Comparison

The current OISGX Sharpe Ratio is 1.78, which is comparable to the OILGX Sharpe Ratio of 1.80. The chart below compares the historical Sharpe Ratios of OISGX and OILGX, 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

	OISGX	OILGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.78	1.80	-0.01
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.20	0.63	-0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	0.79	-0.22
Sharpe Ratio (All Time) Calculated using the full available price history	0.42	0.59	-0.17

Drawdowns

OISGX vs. OILGX - Drawdown Comparison

The maximum OISGX drawdown since its inception was -62.75%, which is greater than OILGX's maximum drawdown of -54.28%. Use the drawdown chart below to compare losses from any high point for OISGX and OILGX.

Drawdown Indicators

	OISGX	OILGX	Difference
Max Drawdown Largest peak-to-trough decline	-62.75%	-54.28%	-8.47%
Max Drawdown (1Y) Largest decline over 1 year	-15.52%	-15.31%	-0.21%
Max Drawdown (3Y) Largest decline over 3 years	-29.82%	-23.75%	-6.07%
Max Drawdown (5Y) Largest decline over 5 years	-35.63%	-39.97%	+4.34%
Max Drawdown (10Y) Largest decline over 10 years	-39.22%	-39.97%	+0.75%
Current Drawdown Current decline from peak	0.00%	-0.29%	+0.29%
Average Drawdown Average peak-to-trough decline	-12.26%	-8.48%	-3.78%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.97%	4.33%	-0.36%

Volatility

OISGX vs. OILGX - Volatility Comparison

Optimum Small-Mid Cap Growth Fund (OISGX) has a higher volatility of 6.15% compared to Optimum Large Cap Growth Fund (OILGX) at 3.64%. This indicates that OISGX's price experiences larger fluctuations and is considered to be riskier than OILGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OISGX	OILGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.15%	3.64%	+2.51%
Volatility (6M) Calculated over the trailing 6-month period	15.61%	12.02%	+3.59%
Volatility (1Y) Calculated over the trailing 1-year period	20.36%	16.03%	+4.33%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.14%	23.40%	-0.26%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.42%	22.04%	+1.38%

OISGX vs. OILGX - Expense Ratio Comparison

OISGX has a 1.29% expense ratio, which is higher than OILGX's 0.89% expense ratio.

Dividends

OISGX vs. OILGX - Dividend Comparison

OISGX's dividend yield for the trailing twelve months is around 2.31%, less than OILGX's 12.77% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OILGX Optimum Large Cap Growth Fund	12.77%	14.05%	20.62%	11.50%	4.95%	14.42%	7.72%	2.98%	14.76%	18.13%	3.68%	10.49%
OISGX Optimum Small-Mid Cap Growth Fund	2.31%	2.65%	0.00%	0.00%	8.92%	32.79%	15.04%	9.33%	24.93%	4.21%	0.00%	15.87%

Frequently Asked Questions

Can I hold both OISGX and OILGX in my portfolio?

OISGX and OILGX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OISGX or OILGX?

OISGX has higher volatility (6.15%) compared to OILGX (3.64%). In terms of maximum drawdown, OISGX dropped -62.75% vs OILGX's -54.28%.

Which has better risk-adjusted returns?

OILGX currently has the higher Sharpe Ratio (1.80 vs 1.78), 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.