RPTIX vs. MMGPX

Last updated Apr 1, 2026

Compare and contrast key facts about T. Rowe Price Mid-Cap Growth Fund Class I (RPTIX) and Morgan Stanley Discovery Portfolio (MMGPX).

RPTIX is a passively managed fund by T. Rowe Price that tracks the performance of the Russell MidCap Growth Index. It was launched on Aug 28, 2015. MMGPX is managed by Morgan Stanley. It was launched on Apr 30, 2017.

Performance

RPTIX vs. MMGPX - Performance Comparison

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

RPTIX vs. MMGPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RPTIX T. Rowe Price Mid-Cap Growth Fund Class I	-6.64%	10.68%	9.48%	20.42%	-22.39%	15.07%	24.31%	31.69%	-1.99%	20.97%
MMGPX Morgan Stanley Discovery Portfolio	-14.93%	12.58%	41.83%	44.34%	-81.34%	-11.55%	152.67%	40.20%	10.89%	28.18%

Returns By Period

In the year-to-date period, RPTIX achieves a -6.64% return, which is significantly higher than MMGPX's -14.93% return.

RPTIX

• 1D: -0.34%
• 1M: -9.23%
• YTD: -6.64%
• 6M: 0.41%
• 1Y: 11.23%
• 3Y*: 8.30%
• 5Y*: 3.37%
• 10Y*: 9.98%

MMGPX

• 1D: -1.27%
• 1M: -9.08%
• YTD: -14.93%
• 6M: -23.43%
• 1Y: 3.91%
• 3Y*: 19.10%
• 5Y*: -19.96%
• 10Y*: —

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

RPTIX vs. MMGPX - Expense Ratio Comparison

RPTIX has a 0.63% expense ratio, which is higher than MMGPX's 0.04% expense ratio.

RPTIX

T. Rowe Price Mid-Cap Growth Fund Class I

MMGPX

Morgan Stanley Discovery Portfolio

Return for Risk

RPTIX vs. MMGPX — Risk / Return Rank

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

RPTIX

RPTIX Risk / Return Rank: 23
RPTIX Sharpe Ratio Rank: 21
RPTIX Sortino Ratio Rank: 24
RPTIX Omega Ratio Rank: 22
RPTIX Calmar Ratio Rank: 24
RPTIX Martin Ratio Rank: 26

MMGPX

MMGPX Risk / Return Rank: 7
MMGPX Sharpe Ratio Rank: 7
MMGPX Sortino Ratio Rank: 8
MMGPX Omega Ratio Rank: 8
MMGPX Calmar Ratio Rank: 6
MMGPX Martin Ratio Rank: 6

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.

RPTIX vs. MMGPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Mid-Cap Growth Fund Class I (RPTIX) 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.

	RPTIX	MMGPX	Difference
Sharpe ratio Return per unit of total volatility	0.57	0.10	+0.47
Sortino ratio Return per unit of downside risk	0.99	0.38	+0.61
Omega ratio Gain probability vs. loss probability	1.13	1.05	+0.09
Calmar ratio Return relative to maximum drawdown	0.71	-0.02	+0.73
Martin ratio Return relative to average drawdown	2.85	-0.05	+2.90
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RPTIX vs. MMGPX - Sharpe Ratio Comparison

The current RPTIX Sharpe Ratio is 0.57, which is higher than the MMGPX Sharpe Ratio of 0.10. The chart below compares the historical Sharpe Ratios of RPTIX 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

	RPTIX	MMGPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.57	0.10	+0.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.18	-0.44	+0.62
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.53	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.53	0.14	+0.39

Correlation

The correlation between RPTIX and MMGPX is 0.74, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

RPTIX vs. MMGPX - Dividend Comparison

RPTIX's dividend yield for the trailing twelve months is around 13.68%, more than MMGPX's 0.50% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016
RPTIX T. Rowe Price Mid-Cap Growth Fund Class I	13.68%	12.77%	10.24%	6.48%	2.59%	10.67%	4.54%	5.41%	12.28%	8.18%	3.60%
MMGPX Morgan Stanley Discovery Portfolio	0.50%	0.43%	0.00%	0.00%	0.00%	64.53%	7.93%	15.63%	28.02%	0.00%	0.00%

Drawdowns

RPTIX vs. MMGPX - Drawdown Comparison

The maximum RPTIX drawdown since its inception was -35.94%, smaller than the maximum MMGPX drawdown of -87.45%. Use the drawdown chart below to compare losses from any high point for RPTIX and MMGPX.

Drawdown Indicators

	RPTIX	MMGPX	Difference
Max Drawdown Largest peak-to-trough decline	-35.94%	-87.45%	+51.51%
Max Drawdown (1Y) Largest decline over 1 year	-12.46%	-27.79%	+15.33%
Max Drawdown (5Y) Largest decline over 5 years	-31.99%	-86.09%	+54.10%
Max Drawdown (10Y) Largest decline over 10 years	-35.94%	—	—
Current Drawdown Current decline from peak	-10.17%	-74.10%	+63.93%
Average Drawdown Average peak-to-trough decline	-6.85%	-38.69%	+31.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.11%	11.11%	-8.00%

Volatility

RPTIX vs. MMGPX - Volatility Comparison

The current volatility for T. Rowe Price Mid-Cap Growth Fund Class I (RPTIX) is 4.75%, while Morgan Stanley Discovery Portfolio (MMGPX) has a volatility of 7.90%. This indicates that RPTIX 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

	RPTIX	MMGPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.75%	7.90%	-3.15%
Volatility (6M) Calculated over the trailing 6-month period	11.46%	21.47%	-10.01%
Volatility (1Y) Calculated over the trailing 1-year period	19.54%	31.90%	-12.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.67%	45.71%	-27.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.76%	39.03%	-20.27%