OEGYX vs. MEIIX

Last updated Jul 17, 2026

OEGYX (Invesco Discovery Mid Cap Growth Fund) and MEIIX (MFS Value Fund Class I) are both mutual funds - OEGYX is a Mid Cap Growth Equities fund managed by Invesco, while MEIIX is a Large Cap Value Equities fund managed by MFS. Over the past 10 years, OEGYX returned 12.85%/yr vs 10.03%/yr for MEIIX. A 0.74 correlation means they provide meaningful diversification when combined. OEGYX charges 0.78%/yr vs 0.55%/yr for MEIIX.

Performance

OEGYX vs. MEIIX - Performance Comparison

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

Returns By Period

In the year-to-date period, OEGYX achieves a 20.14% return, which is significantly higher than MEIIX's 9.38% return. Over the past 10 years, OEGYX has outperformed MEIIX with an annualized return of 12.85%, while MEIIX has yielded a comparatively lower 10.03% annualized return.

OEGYX

• 1D: -0.98%
• 1M: -4.39%
• 6M: 12.95%
• YTD: 20.14%
• 1Y: 23.66%
• 3Y*: 16.59%
• 5Y*: 6.28%
• 10Y*: 12.85%

MEIIX

• 1D: 0.15%
• 1M: 1.26%
• 6M: 5.35%
• YTD: 9.38%
• 1Y: 15.69%
• 3Y*: 13.57%
• 5Y*: 8.85%
• 10Y*: 10.03%

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

OEGYX vs. MEIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OEGYX Invesco Discovery Mid Cap Growth Fund	20.14%	5.08%	24.38%	13.24%	-30.92%	18.76%	40.53%	39.33%	-6.50%	28.34%
MEIIX MFS Value Fund Class I	9.38%	13.26%	11.86%	8.21%	-6.02%	25.43%	3.99%	30.04%	-9.90%	17.20%

Correlation

The correlation between OEGYX and MEIIX is 0.49, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.49
Correlation (3Y) Calculated over the trailing 3-year period	0.57
Correlation (5Y) Calculated over the trailing 5-year period	0.68
Correlation (10Y) Calculated over the trailing 10-year period	0.68
Correlation (All Time) Calculated using the full available price history since Oct 31, 2000	0.74

Over the past year, the correlation between OEGYX and MEIIX has dropped to 0.49 - well below their long-term average of 0.74, suggesting their price drivers have been diverging.

Return for Risk

OEGYX vs. MEIIX — Risk / Return Rank

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

OEGYX

OEGYX Risk / Return Rank: 35
OEGYX Sharpe Ratio Rank: 24
OEGYX Sortino Ratio Rank: 23
OEGYX Omega Ratio Rank: 23
OEGYX Calmar Ratio Rank: 59
OEGYX Martin Ratio Rank: 47

MEIIX

MEIIX Risk / Return Rank: 52
MEIIX Sharpe Ratio Rank: 49
MEIIX Sortino Ratio Rank: 51
MEIIX Omega Ratio Rank: 46
MEIIX Calmar Ratio Rank: 62
MEIIX Martin Ratio Rank: 52

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. MEIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Discovery Mid Cap Growth Fund (OEGYX) and MFS Value Fund Class I (MEIIX). 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	MEIIX	Difference
Sharpe ratio: Return per unit of total volatility	1.10	1.58	-0.48
Sortino ratio: Return per unit of downside risk	1.58	2.30	-0.72
Omega ratio: Gain probability vs. loss probability	1.20	1.28	-0.08
Calmar ratio: Return relative to maximum drawdown	2.40	2.45	-0.05
Martin ratio: Return relative to average drawdown	7.96	8.44	-0.49

OEGYX vs. MEIIX - Sharpe Ratio Comparison

The current OEGYX Sharpe Ratio is 1.10, which is lower than the MEIIX Sharpe Ratio of 1.58. The chart below compares the historical Sharpe Ratios of OEGYX and MEIIX, 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. MEIIX - Drawdown Comparison

The maximum OEGYX drawdown since its inception was -53.44%, roughly equal to the maximum MEIIX drawdown of -52.64%. Use the drawdown chart below to compare losses from any high point for OEGYX and MEIIX.

Drawdown Indicators

	OEGYX	MEIIX	Difference
Max Drawdown Largest peak-to-trough decline	-53.44%	-52.64%	-0.80%
Max Drawdown (1Y) Largest decline over 1 year	-10.14%	-6.76%	-3.38%
Max Drawdown (3Y) Largest decline over 3 years	-28.58%	-13.19%	-15.39%
Max Drawdown (5Y) Largest decline over 5 years	-39.25%	-17.58%	-21.67%
Max Drawdown (10Y) Largest decline over 10 years	-39.25%	-36.70%	-2.55%
Current Drawdown Current decline from peak	-6.52%	-0.35%	-6.17%
Average Drawdown Average peak-to-trough decline	-12.46%	-6.53%	-5.93%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.04%	1.96%	+1.08%

Volatility

OEGYX vs. MEIIX - Volatility Comparison

Invesco Discovery Mid Cap Growth Fund (OEGYX) has a higher volatility of 7.75% compared to MFS Value Fund Class I (MEIIX) at 2.45%. This indicates that OEGYX's price experiences larger fluctuations and is considered to be riskier than MEIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OEGYX	MEIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.75%	2.45%	+5.30%
Volatility (6M) Calculated over the trailing 6-month period	18.32%	7.60%	+10.72%
Volatility (1Y) Calculated over the trailing 1-year period	22.19%	10.58%	+11.61%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.45%	13.92%	+8.53%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.19%	16.47%	+5.72%

OEGYX vs. MEIIX - Expense Ratio Comparison

OEGYX has a 0.78% expense ratio, which is higher than MEIIX's 0.55% expense ratio.

Dividends

OEGYX vs. MEIIX - Dividend Comparison

OEGYX's dividend yield for the trailing twelve months is around 6.20%, less than MEIIX's 8.85% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MEIIX MFS Value Fund Class I	8.85%	9.52%	9.30%	8.41%	7.58%	3.32%	2.63%	3.17%	3.62%	4.04%	2.91%	5.97%
OEGYX Invesco Discovery Mid Cap Growth Fund	6.20%	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 MEIIX in my portfolio?

OEGYX and MEIIX have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OEGYX or MEIIX?

OEGYX has higher volatility (7.75%) compared to MEIIX (2.45%). In terms of maximum drawdown, OEGYX dropped -53.44% vs MEIIX's -52.64%.

Which has better risk-adjusted returns?

MEIIX currently has the higher Sharpe Ratio (1.58 vs 1.10), 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.