OEGAX vs. MSIGX

Last updated Apr 1, 2026

Compare and contrast key facts about Invesco Discovery Mid Cap Growth Fund Class A (OEGAX) and Invesco Main Street Fund (MSIGX).

OEGAX is an actively managed fund by Invesco. It was launched on Nov 1, 2000. MSIGX is managed by Invesco. It was launched on Feb 3, 1988.

Performance

OEGAX vs. MSIGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Discovery Mid Cap Growth Fund Class A (OEGAX) and Invesco Main Street Fund (MSIGX). The values are adjusted to include any dividend payments, if applicable.

OEGAX vs. MSIGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OEGAX Invesco Discovery Mid Cap Growth Fund Class A	0.93%	4.85%	24.09%	12.96%	-31.09%	18.44%	40.12%	38.98%	-6.72%	27.95%
MSIGX Invesco Main Street Fund	-9.61%	16.02%	23.66%	23.06%	-20.21%	27.37%	14.41%	22.49%	-8.25%	16.79%

Returns By Period

In the year-to-date period, OEGAX achieves a 0.93% return, which is significantly higher than MSIGX's -9.61% return. Over the past 10 years, OEGAX has outperformed MSIGX with an annualized return of 11.40%, while MSIGX has yielded a comparatively lower 10.31% annualized return.

OEGAX

• 1D: -2.41%
• 1M: -10.13%
• YTD: 0.93%
• 6M: -0.96%
• 1Y: 20.80%
• 3Y*: 12.14%
• 5Y*: 3.64%
• 10Y*: 11.40%

MSIGX

• 1D: -0.32%
• 1M: -9.12%
• YTD: -9.61%
• 6M: -8.53%
• 1Y: 9.67%
• 3Y*: 14.18%
• 5Y*: 8.48%
• 10Y*: 10.31%

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

OEGAX vs. MSIGX - Expense Ratio Comparison

OEGAX has a 1.05% expense ratio, which is higher than MSIGX's 0.82% expense ratio.

OEGAX

Invesco Discovery Mid Cap Growth Fund Class A

MSIGX

Invesco Main Street Fund

Return for Risk

OEGAX vs. MSIGX — Risk / Return Rank

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

OEGAX

OEGAX Risk / Return Rank: 33
OEGAX Sharpe Ratio Rank: 48
OEGAX Sortino Ratio Rank: 51
OEGAX Omega Ratio Rank: 45
OEGAX Calmar Ratio Rank: 10
OEGAX Martin Ratio Rank: 11

MSIGX

MSIGX Risk / Return Rank: 20
MSIGX Sharpe Ratio Rank: 26
MSIGX Sortino Ratio Rank: 30
MSIGX Omega Ratio Rank: 29
MSIGX Calmar Ratio Rank: 7
MSIGX Martin Ratio Rank: 7

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.

OEGAX vs. MSIGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Discovery Mid Cap Growth Fund Class A (OEGAX) and Invesco Main Street Fund (MSIGX). 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.

	OEGAX	MSIGX	Difference
Sharpe ratio Return per unit of total volatility	0.97	0.62	+0.35
Sortino ratio Return per unit of downside risk	1.46	1.04	+0.41
Omega ratio Gain probability vs. loss probability	1.20	1.15	+0.05
Calmar ratio Return relative to maximum drawdown	0.24	0.01	+0.23
Martin ratio Return relative to average drawdown	0.84	0.05	+0.79
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OEGAX vs. MSIGX - Sharpe Ratio Comparison

The current OEGAX Sharpe Ratio is 0.97, which is higher than the MSIGX Sharpe Ratio of 0.62. The chart below compares the historical Sharpe Ratios of OEGAX and MSIGX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	OEGAX	MSIGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.97	0.62	+0.35
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.17	0.52	-0.35
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.53	0.59	-0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	0.62	-0.28

Correlation

The correlation between OEGAX and MSIGX is 0.85, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

OEGAX vs. MSIGX - Dividend Comparison

OEGAX's dividend yield for the trailing twelve months is around 9.01%, more than MSIGX's 8.29% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OEGAX Invesco Discovery Mid Cap Growth Fund Class A	9.01%	9.10%	4.95%	0.00%	0.00%	18.94%	3.55%	4.40%	10.54%	9.32%	0.89%	4.27%
MSIGX Invesco Main Street Fund	8.29%	7.50%	6.06%	7.40%	4.68%	19.19%	3.17%	0.89%	19.62%	7.50%	2.96%	13.79%

Drawdowns

OEGAX vs. MSIGX - Drawdown Comparison

The maximum OEGAX drawdown since its inception was -53.73%, smaller than the maximum MSIGX drawdown of -57.22%. Use the drawdown chart below to compare losses from any high point for OEGAX and MSIGX.

Drawdown Indicators

	OEGAX	MSIGX	Difference
Max Drawdown Largest peak-to-trough decline	-53.73%	-57.22%	+3.49%
Max Drawdown (1Y) Largest decline over 1 year	-12.87%	-11.78%	-1.09%
Max Drawdown (5Y) Largest decline over 5 years	-39.38%	-26.73%	-12.65%
Max Drawdown (10Y) Largest decline over 10 years	-39.38%	-35.41%	-3.97%
Current Drawdown Current decline from peak	-10.16%	-10.96%	+0.80%
Average Drawdown Average peak-to-trough decline	-12.86%	-9.03%	-3.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.16%	4.31%	+1.85%

Volatility

OEGAX vs. MSIGX - Volatility Comparison

Invesco Discovery Mid Cap Growth Fund Class A (OEGAX) has a higher volatility of 7.85% compared to Invesco Main Street Fund (MSIGX) at 4.09%. This indicates that OEGAX's price experiences larger fluctuations and is considered to be riskier than MSIGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OEGAX	MSIGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.85%	4.09%	+3.76%
Volatility (6M) Calculated over the trailing 6-month period	15.99%	9.04%	+6.95%
Volatility (1Y) Calculated over the trailing 1-year period	24.27%	18.35%	+5.92%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.03%	16.87%	+5.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.92%	17.85%	+4.07%