MGK vs. RPG

Last updated Jun 24, 2026

MGK (Vanguard Mega Cap Growth ETF) and RPG (Invesco S&P 500 Pure Growth ETF) are both Large Cap Growth Equities funds - MGK tracks the CRSP US Mega Cap Growth Index while RPG tracks the S&P 500/Citigroup Pure Growth Index. Both are passively managed. Over the past 10 years, MGK returned 18.97%/yr vs 15.14%/yr for RPG. Their correlation of 0.87 suggests significant overlap in exposure. MGK charges 0.05%/yr vs 0.35%/yr for RPG.

Performance

MGK vs. RPG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mega Cap Growth ETF (MGK) and Invesco S&P 500 Pure Growth ETF (RPG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MGK achieves a 3.65% return, which is significantly lower than RPG's 30.31% return. Over the past 10 years, MGK has outperformed RPG with an annualized return of 18.97%, while RPG has yielded a comparatively lower 15.14% annualized return.

MGK

• 1D: -2.12%
• 1M: -3.93%
• YTD: 3.65%
• 6M: 2.34%
• 1Y: 21.62%
• 3Y*: 23.33%
• 5Y*: 13.84%
• 10Y*: 18.97%

RPG

• 1D: -4.60%
• 1M: 5.48%
• YTD: 30.31%
• 6M: 27.62%
• 1Y: 38.51%
• 3Y*: 27.72%
• 5Y*: 11.59%
• 10Y*: 15.14%

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

MGK vs. RPG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGK Vanguard Mega Cap Growth ETF	3.65%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%
RPG Invesco S&P 500 Pure Growth ETF	30.31%	13.41%	28.23%	8.04%	-27.55%	29.40%	29.34%	28.34%	-4.53%	26.20%

Correlation

The correlation between MGK and RPG is 0.73, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.81
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Dec 27, 2007	0.87

The correlation between MGK and RPG shifts across timeframes, from 0.73 (1 year) to 0.87 (all time), reflecting how their relationship changes across market environments.

MGK vs. RPG - Sectors Allocation Comparison

Sectors	MGK	RPG
Technology	59.0%	46.9%
Communication Services	15.8%	5.4%
Consumer Cyclical	12.2%	14.7%
Healthcare	4.6%	6.4%
Financial Services	4.1%	5.3%
Real Estate	1.1%	1.0%
Utilities	1.0%	2.4%
Industrials	1.0%	14.0%
Basic Materials	0.6%	1.2%
Consumer Defensive	0.4%	1.1%
Energy	-	1.6%

Return for Risk

MGK vs. RPG — Risk / Return Rank

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

MGK

MGK Risk / Return Rank: 33
MGK Sharpe Ratio Rank: 36
MGK Sortino Ratio Rank: 34
MGK Omega Ratio Rank: 34
MGK Calmar Ratio Rank: 27
MGK Martin Ratio Rank: 31

RPG

RPG Risk / Return Rank: 61
RPG Sharpe Ratio Rank: 55
RPG Sortino Ratio Rank: 52
RPG Omega Ratio Rank: 53
RPG Calmar Ratio Rank: 72
RPG Martin Ratio Rank: 73

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.

MGK vs. RPG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap Growth ETF (MGK) and Invesco S&P 500 Pure Growth ETF (RPG). 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.

	MGK	RPG	Difference
Sharpe ratio: Return per unit of total volatility	1.26	1.75	-0.50
Sortino ratio: Return per unit of downside risk	1.76	2.37	-0.61
Omega ratio: Gain probability vs. loss probability	1.22	1.31	-0.09
Calmar ratio: Return relative to maximum drawdown	1.29	3.49	-2.20
Martin ratio: Return relative to average drawdown	4.31	13.16	-8.85

MGK vs. RPG - Sharpe Ratio Comparison

The current MGK Sharpe Ratio is 1.26, which is comparable to the RPG Sharpe Ratio of 1.75. The chart below compares the historical Sharpe Ratios of MGK and RPG, 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

MGK vs. RPG - Drawdown Comparison

The maximum MGK drawdown since its inception was -48.43%, smaller than the maximum RPG drawdown of -53.27%. Use the drawdown chart below to compare losses from any high point for MGK and RPG.

Drawdown Indicators

	MGK	RPG	Difference
Max Drawdown Largest peak-to-trough decline	-48.43%	-53.27%	+4.84%
Max Drawdown (1Y) Largest decline over 1 year	-16.85%	-11.08%	-5.77%
Max Drawdown (3Y) Largest decline over 3 years	-23.36%	-24.75%	+1.39%
Max Drawdown (5Y) Largest decline over 5 years	-36.01%	-35.59%	-0.42%
Max Drawdown (10Y) Largest decline over 10 years	-36.01%	-36.58%	+0.57%
Current Drawdown Current decline from peak	-7.14%	-4.60%	-2.54%
Average Drawdown Average peak-to-trough decline	-7.58%	-8.83%	+1.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.02%	2.93%	+2.09%

Volatility

MGK vs. RPG - Volatility Comparison

The current volatility for Vanguard Mega Cap Growth ETF (MGK) is 7.08%, while Invesco S&P 500 Pure Growth ETF (RPG) has a volatility of 11.10%. This indicates that MGK experiences smaller price fluctuations and is considered to be less risky than RPG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGK	RPG	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.08%	11.10%	-4.02%
Volatility (6M) Calculated over the trailing 6-month period	13.75%	19.02%	-5.27%
Volatility (1Y) Calculated over the trailing 1-year period	17.33%	22.09%	-4.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.80%	23.86%	-1.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.96%	22.90%	-0.94%

MGK vs. RPG - Expense Ratio Comparison

MGK has a 0.05% expense ratio, which is lower than RPG's 0.35% expense ratio.

Dividends

MGK vs. RPG - Dividend Comparison

MGK's dividend yield for the trailing twelve months is around 0.34%, more than RPG's 0.15% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MGK Vanguard Mega Cap Growth ETF	0.34%	0.35%	0.43%	0.50%	0.70%	0.41%	0.65%	0.85%	1.12%	1.23%	1.53%	1.43%
RPG Invesco S&P 500 Pure Growth ETF	0.15%	0.24%	0.25%	1.44%	0.74%	0.00%	0.46%	0.83%	0.47%	0.56%	0.43%	0.73%

Frequently Asked Questions

Can I hold both MGK and RPG in my portfolio?

MGK and RPG have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MGK or RPG?

RPG has higher volatility (11.10%) compared to MGK (7.08%). In terms of maximum drawdown, MGK dropped -48.43% vs RPG's -53.27%.

Which ETF is better, MGK or RPG?

On 10-year performance, MGK leads with 18.97% vs 15.14% for RPG. On fees, MGK is cheaper at 0.05% per year. On volatility, MGK has been the lower-risk option at 7.08%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MGK or RPG?

Over the 10-year period, MGK has performed better with a 18.97% return vs 15.14%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MGK or RPG?

MGK is cheaper with a 0.05% expense ratio, compared with 0.35% for RPG.

Which ETF pays a higher dividend yield, MGK or RPG?

MGK has the higher dividend yield at 0.34%, compared with 0.15% for RPG.

What is the main difference between MGK and RPG?

MGK tracks CRSP US Mega Cap Growth Index, while RPG tracks S&P 500/Citigroup Pure Growth Index. They also come from different issuers: Vanguard and Invesco. Their fees differ too: 0.05% for MGK and 0.35% for RPG.

Which has better risk-adjusted returns?

RPG currently has the higher Sharpe Ratio (1.75 vs 1.26), 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.