IMIDX vs. OEGYX

Last updated Jun 23, 2026

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

Performance

IMIDX vs. OEGYX - Performance Comparison

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

Returns By Period

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

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%

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%

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

IMIDX vs. OEGYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
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%

Correlation

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

Return for Risk

IMIDX vs. OEGYX — Risk / Return Rank

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

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

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

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.

IMIDX vs. OEGYX - Risk-Adjusted Trends Comparison

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

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

IMIDX vs. OEGYX - Sharpe Ratio Comparison

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

IMIDX vs. OEGYX - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

IMIDX vs. OEGYX - Volatility Comparison

The current volatility for Congress Mid Cap Growth Fund (IMIDX) is 6.59%, while Invesco Discovery Mid Cap Growth Fund (OEGYX) has a volatility of 7.74%. This indicates that IMIDX experiences smaller price fluctuations and is considered to be less risky than OEGYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

IMIDX vs. OEGYX - Expense Ratio Comparison

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

Dividends

IMIDX vs. OEGYX - Dividend Comparison

IMIDX's dividend yield for the trailing twelve months is around 11.18%, more than OEGYX's 5.89% 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 IMIDX and OEGYX in my portfolio?

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

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

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.