OTCAX vs. MMGPX

Last updated Aug 1, 2026

OTCAX (MFS Mid Cap Growth Fund) and MMGPX (Morgan Stanley Discovery Portfolio) are both Mid Cap Growth Equities funds. Over the past 5 years, OTCAX returned 3.22%/yr vs -6.17%/yr for MMGPX. Their 0.78 correlation means they have sometimes moved together and sometimes differently. OTCAX charges 1.00%/yr vs 0.04%/yr for MMGPX.

Performance

OTCAX vs. MMGPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Mid Cap Growth Fund (OTCAX) and Morgan Stanley Discovery Portfolio (MMGPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OTCAX achieves a 2.18% return, which is significantly higher than MMGPX's -0.96% return.

OTCAX

• 1D: 2.10%
• 1M: -3.22%
• 6M: 2.83%
• YTD: 2.18%
• 1Y: -1.26%
• 3Y*: 11.20%
• 5Y*: 3.22%
• 10Y*: 11.54%
• ALL TIME*: 8.63%

MMGPX

• 1D: 2.26%
• 1M: -3.86%
• 6M: 4.78%
• YTD: -0.96%
• 1Y: -10.52%
• 3Y*: 17.63%
• 5Y*: -6.17%
• 10Y*: —
• ALL TIME*: 14.86%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
MMGPX Morgan Stanley Discovery Portfolio	$0.00	$0.00	$0.00
OTCAX MFS Mid Cap Growth Fund	$0.00	$0.00	$0.00

OTCAX vs. MMGPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OTCAX MFS Mid Cap Growth Fund	2.18%	3.32%	23.47%	21.00%	-28.53%	13.66%	35.34%	37.43%	0.82%	22.67%
MMGPX Morgan Stanley Discovery Portfolio	-0.96%	12.58%	41.83%	44.34%	-63.37%	-11.55%	152.67%	40.20%	10.89%	28.18%

Correlation

The correlation between OTCAX and MMGPX is 0.75, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.75
Correlation (3Y) Balances recent behavior with more history.	0.75
Correlation (5Y) Shows whether the relationship held over a longer period.	0.79
Correlation (All Time) Calculated using the full available price history since Feb 1, 2017	0.78

The correlation between OTCAX and MMGPX has been stable across timeframes, ranging from 0.75 to 0.79 - a consistent structural relationship.

Return for Risk

OTCAX vs. MMGPX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

OTCAX

OTCAX Risk / Return Rank: 3
OTCAX Sharpe Ratio Rank: 3
OTCAX Sortino Ratio Rank: 3
OTCAX Omega Ratio Rank: 3
OTCAX Calmar Ratio Rank: 3
OTCAX Martin Ratio Rank: 3

MMGPX

MMGPX Risk / Return Rank: 2
MMGPX Sharpe Ratio Rank: 2
MMGPX Sortino Ratio Rank: 2
MMGPX Omega Ratio Rank: 2
MMGPX Calmar Ratio Rank: 2
MMGPX Martin Ratio Rank: 2

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

OTCAX vs. MMGPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Growth Fund (OTCAX) and Morgan Stanley Discovery Portfolio (MMGPX). 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.

	OTCAX	MMGPX	Difference
Sharpe ratio: Return per unit of total volatility	-0.17	-0.33	+0.16
Sortino ratio: Return per unit of downside risk	-0.12	-0.28	+0.16
Omega ratio: Gain probability vs. loss probability	0.99	0.97	+0.02
Calmar ratio: Return relative to maximum drawdown	-0.19	-0.34	+0.16
Martin ratio: Return relative to average drawdown	-0.46	-0.66	+0.20

OTCAX vs. MMGPX - Sharpe Ratio Comparison

The current OTCAX Sharpe Ratio is -0.17, which is higher than the MMGPX Sharpe Ratio of -0.33. The chart below compares the historical Sharpe Ratios of OTCAX and MMGPX, 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

OTCAX vs. MMGPX - Drawdown Comparison

The maximum OTCAX drawdown since its inception was -74.39%, roughly equal to the maximum MMGPX drawdown of -75.38%. Use the drawdown chart below to compare losses from any high point for OTCAX and MMGPX.

Drawdown Indicators

	OTCAX	MMGPX	Difference
Max Drawdown Largest peak-to-trough decline	-74.39%	-75.38%	+0.99%
Max Drawdown (1Y) Largest decline over 1 year	-16.46%	-27.79%	+11.33%
Max Drawdown (3Y) Largest decline over 3 years	-21.05%	-29.27%	+8.22%
Max Drawdown (5Y) Largest decline over 5 years	-36.85%	-72.70%	+35.85%
Max Drawdown (10Y) Largest decline over 10 years	-36.85%	—	—
Current Drawdown Current decline from peak	-5.51%	-40.82%	+35.31%
Average Drawdown Average peak-to-trough decline	-23.03%	-30.40%	+7.37%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.60%	14.47%	-7.87%

Volatility

OTCAX vs. MMGPX - Volatility Comparison

The current volatility for MFS Mid Cap Growth Fund (OTCAX) is 4.82%, while Morgan Stanley Discovery Portfolio (MMGPX) has a volatility of 6.84%. This indicates that OTCAX experiences smaller price fluctuations and is considered to be less risky than MMGPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OTCAX	MMGPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.82%	6.84%	-2.02%
Volatility (6M) Calculated over the trailing 6-month period	14.58%	21.99%	-7.41%
Volatility (1Y) Calculated over the trailing 1-year period	17.73%	28.90%	-11.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.39%	39.83%	-19.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.02%	35.11%	-15.09%

OTCAX vs. MMGPX - Expense Ratio Comparison

OTCAX has a 1.00% expense ratio, which is higher than MMGPX's 0.04% expense ratio.

Dividends

OTCAX vs. MMGPX - Dividend Comparison

OTCAX's dividend yield for the trailing twelve months is around 16.40%, while MMGPX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MMGPX Morgan Stanley Discovery Portfolio	0.00%	0.43%	0.00%	0.00%	125.40%	64.53%	7.93%	15.63%	28.02%	0.00%	0.00%	0.00%
OTCAX MFS Mid Cap Growth Fund	16.40%	16.76%	15.59%	0.00%	0.00%	3.64%	0.83%	0.86%	4.70%	8.80%	5.67%	2.84%

Frequently Asked Questions

Can I hold both OTCAX and MMGPX in my portfolio?

OTCAX and MMGPX have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OTCAX or MMGPX?

MMGPX has higher volatility (6.84%) compared to OTCAX (4.82%). In terms of maximum drawdown, OTCAX dropped -74.39% vs MMGPX's -75.38%.

Which has better risk-adjusted returns?

OTCAX currently has the higher Sharpe Ratio (-0.17 vs -0.33), 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.