OEGYX vs. IMIDX

Last updated Jun 23, 2026

OEGYX (Invesco Discovery Mid Cap Growth Fund) and IMIDX (Congress Mid Cap Growth Fund) are both Mid Cap Growth Equities funds. Over the past 10 years, OEGYX returned 13.83%/yr vs 12.32%/yr for IMIDX. Their correlation of 0.91 suggests significant overlap in exposure. OEGYX charges 0.78%/yr vs 0.79%/yr for IMIDX.

Performance

OEGYX vs. IMIDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Discovery Mid Cap Growth Fund (OEGYX) and Congress Mid Cap Growth Fund (IMIDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OEGYX achieves a 26.57% return, which is significantly higher than IMIDX's 18.73% return. Over the past 10 years, OEGYX has outperformed IMIDX with an annualized return of 13.83%, while IMIDX has yielded a comparatively lower 12.32% annualized return.

OEGYX

• 1D: 1.47%
• 1M: 3.72%
• YTD: 26.57%
• 6M: 23.37%
• 1Y: 32.37%
• 3Y*: 20.27%
• 5Y*: 7.87%
• 10Y*: 13.83%

IMIDX

• 1D: 1.39%
• 1M: 3.99%
• YTD: 18.73%
• 6M: 15.94%
• 1Y: 18.19%
• 3Y*: 12.37%
• 5Y*: 5.67%
• 10Y*: 12.32%

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

OEGYX vs. IMIDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OEGYX Invesco Discovery Mid Cap Growth Fund	26.57%	5.08%	24.38%	13.24%	-30.92%	18.76%	40.53%	39.33%	-6.50%	28.34%
IMIDX Congress Mid Cap Growth Fund	18.73%	-4.88%	18.11%	16.29%	-26.94%	29.42%	30.57%	42.36%	-4.98%	15.91%

Correlation

The correlation between OEGYX and IMIDX 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	0.90
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Nov 1, 2012	0.91

The correlation between OEGYX and IMIDX has been stable across timeframes, ranging from 0.90 to 0.92 - a consistent structural relationship.

Return for Risk

OEGYX vs. IMIDX — Risk / Return Rank

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

OEGYX

OEGYX Risk / Return Rank: 46
OEGYX Sharpe Ratio Rank: 33
OEGYX Sortino Ratio Rank: 30
OEGYX Omega Ratio Rank: 31
OEGYX Calmar Ratio Rank: 75
OEGYX Martin Ratio Rank: 62

IMIDX

IMIDX Risk / Return Rank: 15
IMIDX Sharpe Ratio Rank: 13
IMIDX Sortino Ratio Rank: 14
IMIDX Omega Ratio Rank: 13
IMIDX Calmar Ratio Rank: 19
IMIDX Martin Ratio Rank: 15

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.

OEGYX vs. IMIDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Discovery Mid Cap Growth Fund (OEGYX) and Congress Mid Cap Growth Fund (IMIDX). 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.

	OEGYX	IMIDX	Difference
Sharpe ratio: Return per unit of total volatility	1.54	0.95	+0.60
Sortino ratio: Return per unit of downside risk	2.13	1.46	+0.67
Omega ratio: Gain probability vs. loss probability	1.27	1.17	+0.10
Calmar ratio: Return relative to maximum drawdown	3.24	1.49	+1.75
Martin ratio: Return relative to average drawdown	11.54	3.92	+7.62

OEGYX vs. IMIDX - Sharpe Ratio Comparison

The current OEGYX Sharpe Ratio is 1.54, which is higher than the IMIDX Sharpe Ratio of 0.95. The chart below compares the historical Sharpe Ratios of OEGYX and IMIDX, 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

OEGYX vs. IMIDX - Drawdown Comparison

The maximum OEGYX drawdown since its inception was -53.44%, which is greater than IMIDX's maximum drawdown of -35.15%. Use the drawdown chart below to compare losses from any high point for OEGYX and IMIDX.

Drawdown Indicators

	OEGYX	IMIDX	Difference
Max Drawdown Largest peak-to-trough decline	-53.44%	-35.15%	-18.29%
Max Drawdown (1Y) Largest decline over 1 year	-10.14%	-12.10%	+1.96%
Max Drawdown (3Y) Largest decline over 3 years	-28.58%	-23.49%	-5.09%
Max Drawdown (5Y) Largest decline over 5 years	-39.25%	-34.88%	-4.37%
Max Drawdown (10Y) Largest decline over 10 years	-39.25%	-35.15%	-4.10%
Current Drawdown Current decline from peak	-0.67%	-0.83%	+0.16%
Average Drawdown Average peak-to-trough decline	-12.48%	-7.18%	-5.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.83%	4.58%	-1.75%

Volatility

OEGYX vs. IMIDX - Volatility Comparison

Invesco Discovery Mid Cap Growth Fund (OEGYX) has a higher volatility of 7.74% compared to Congress Mid Cap Growth Fund (IMIDX) at 6.59%. This indicates that OEGYX's price experiences larger fluctuations and is considered to be riskier than IMIDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OEGYX	IMIDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.74%	6.59%	+1.15%
Volatility (6M) Calculated over the trailing 6-month period	17.56%	15.63%	+1.93%
Volatility (1Y) Calculated over the trailing 1-year period	21.26%	19.01%	+2.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.27%	21.52%	+0.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.13%	21.17%	+0.96%

OEGYX vs. IMIDX - Expense Ratio Comparison

OEGYX has a 0.78% expense ratio, which is lower than IMIDX's 0.79% expense ratio.

Dividends

OEGYX vs. IMIDX - Dividend Comparison

OEGYX's dividend yield for the trailing twelve months is around 5.89%, less than IMIDX's 11.18% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IMIDX Congress Mid Cap Growth Fund	11.18%	13.27%	27.75%	6.27%	5.80%	12.29%	2.06%	10.80%	2.99%	0.04%	1.11%	0.80%
OEGYX Invesco Discovery Mid Cap Growth Fund	5.89%	7.45%	4.13%	0.00%	0.00%	16.02%	3.08%	3.85%	9.31%	8.34%	0.81%	3.88%

Frequently Asked Questions

Can I hold both OEGYX and IMIDX in my portfolio?

With a correlation of 0.91, OEGYX and IMIDX 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, OEGYX or IMIDX?

OEGYX has higher volatility (7.74%) compared to IMIDX (6.59%). In terms of maximum drawdown, OEGYX dropped -53.44% vs IMIDX's -35.15%.

Which has better risk-adjusted returns?

OEGYX currently has the higher Sharpe Ratio (1.54 vs 0.95), 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.