PMBMX vs. MMGPX

Last updated Apr 2, 2026

Compare and contrast key facts about Principal MidCap Fund (PMBMX) and Morgan Stanley Discovery Portfolio (MMGPX).

PMBMX is managed by Principal. It was launched on Dec 6, 2000. MMGPX is managed by Morgan Stanley. It was launched on Apr 30, 2017.

Performance

PMBMX vs. MMGPX - Performance Comparison

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

PMBMX vs. MMGPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PMBMX Principal MidCap Fund	-11.17%	1.16%	23.38%	25.36%	-23.52%	24.63%	17.69%	49.09%	-7.28%	21.21%
MMGPX Morgan Stanley Discovery Portfolio	-11.10%	12.58%	41.83%	44.34%	-81.34%	-11.55%	152.67%	40.20%	10.89%	28.18%

Returns By Period

The year-to-date returns for both investments are quite close, with PMBMX having a -11.17% return and MMGPX slightly higher at -11.10%.

PMBMX

• 1D: 2.16%
• 1M: -7.75%
• YTD: -11.17%
• 6M: -13.90%
• 1Y: -10.17%
• 3Y*: 9.64%
• 5Y*: 4.79%
• 10Y*: 11.26%

MMGPX

• 1D: 4.51%
• 1M: -4.98%
• YTD: -11.10%
• 6M: -20.66%
• 1Y: 6.81%
• 3Y*: 20.87%
• 5Y*: -19.56%
• 10Y*: —

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

PMBMX vs. MMGPX - Expense Ratio Comparison

PMBMX has a 1.15% expense ratio, which is higher than MMGPX's 0.04% expense ratio.

PMBMX

Principal MidCap Fund

MMGPX

Morgan Stanley Discovery Portfolio

Return for Risk

PMBMX vs. MMGPX — Risk / Return Rank

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

PMBMX

PMBMX Risk / Return Rank: 1
PMBMX Sharpe Ratio Rank: 1
PMBMX Sortino Ratio Rank: 1
PMBMX Omega Ratio Rank: 1
PMBMX Calmar Ratio Rank: 1
PMBMX Martin Ratio Rank: 1

MMGPX

MMGPX Risk / Return Rank: 8
MMGPX Sharpe Ratio Rank: 8
MMGPX Sortino Ratio Rank: 10
MMGPX Omega Ratio Rank: 9
MMGPX Calmar Ratio Rank: 8
MMGPX 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.

PMBMX vs. MMGPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal MidCap Fund (PMBMX) 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.

	PMBMX	MMGPX	Difference
Sharpe ratio Return per unit of total volatility	-0.53	0.27	-0.80
Sortino ratio Return per unit of downside risk	-0.64	0.62	-1.26
Omega ratio Gain probability vs. loss probability	0.92	1.08	-0.16
Calmar ratio Return relative to maximum drawdown	-0.53	0.28	-0.81
Martin ratio Return relative to average drawdown	-1.55	0.70	-2.25
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PMBMX vs. MMGPX - Sharpe Ratio Comparison

The current PMBMX Sharpe Ratio is -0.53, which is lower than the MMGPX Sharpe Ratio of 0.27. The chart below compares the historical Sharpe Ratios of PMBMX and MMGPX, 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

	PMBMX	MMGPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.53	0.27	-0.80
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	-0.43	+0.69
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.15	+0.40

Correlation

The correlation between PMBMX and MMGPX is 0.65, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

PMBMX vs. MMGPX - Dividend Comparison

PMBMX's dividend yield for the trailing twelve months is around 7.22%, more than MMGPX's 0.48% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PMBMX Principal MidCap Fund	7.22%	6.41%	6.86%	2.68%	3.43%	8.51%	1.15%	9.00%	12.79%	3.39%	2.16%	6.38%
MMGPX Morgan Stanley Discovery Portfolio	0.48%	0.43%	0.00%	0.00%	0.00%	64.53%	7.93%	15.63%	28.02%	0.00%	0.00%	0.00%

Drawdowns

PMBMX vs. MMGPX - Drawdown Comparison

The maximum PMBMX drawdown since its inception was -50.69%, smaller than the maximum MMGPX drawdown of -87.45%. Use the drawdown chart below to compare losses from any high point for PMBMX and MMGPX.

Drawdown Indicators

	PMBMX	MMGPX	Difference
Max Drawdown Largest peak-to-trough decline	-50.69%	-87.45%	+36.76%
Max Drawdown (1Y) Largest decline over 1 year	-19.53%	-27.79%	+8.26%
Max Drawdown (5Y) Largest decline over 5 years	-31.48%	-86.09%	+54.61%
Max Drawdown (10Y) Largest decline over 10 years	-40.60%	—	—
Current Drawdown Current decline from peak	-17.13%	-72.93%	+55.80%
Average Drawdown Average peak-to-trough decline	-6.67%	-38.71%	+32.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.65%	11.21%	-4.56%

Volatility

PMBMX vs. MMGPX - Volatility Comparison

The current volatility for Principal MidCap Fund (PMBMX) is 5.25%, while Morgan Stanley Discovery Portfolio (MMGPX) has a volatility of 9.28%. This indicates that PMBMX 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

	PMBMX	MMGPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.25%	9.28%	-4.03%
Volatility (6M) Calculated over the trailing 6-month period	10.60%	21.94%	-11.34%
Volatility (1Y) Calculated over the trailing 1-year period	18.40%	32.15%	-13.75%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.57%	45.74%	-27.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.12%	39.05%	-19.93%