MGK vs. BRK-B

Last updated Jul 2, 2026

MGK (Vanguard Mega Cap Growth ETF) is Large Cap Growth Equities fund tracking the CRSP US Mega Cap Growth Index, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, MGK returned 18.92%/yr vs 13.25%/yr for BRK-B. A 0.53 correlation means they provide meaningful diversification when combined.

Performance

MGK vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mega Cap Growth ETF (MGK) and Berkshire Hathaway Inc. (BRK-B). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MGK achieves a 6.69% return, which is significantly higher than BRK-B's -0.58% return. Over the past 10 years, MGK has outperformed BRK-B with an annualized return of 18.92%, while BRK-B has yielded a comparatively lower 13.25% annualized return.

MGK

• 1D: 0.00%
• 1M: -4.41%
• YTD: 6.69%
• 6M: 6.69%
• 1Y: 21.76%
• 3Y*: 23.71%
• 5Y*: 13.92%
• 10Y*: 18.92%

BRK-B

• 1D: -0.13%
• 1M: 6.26%
• YTD: -0.58%
• 6M: -0.58%
• 1Y: 2.07%
• 3Y*: 13.59%
• 5Y*: 12.35%
• 10Y*: 13.25%

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

MGK vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGK Vanguard Mega Cap Growth ETF	6.69%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%
BRK-B Berkshire Hathaway Inc.	-0.58%	10.89%	27.09%	15.46%	3.31%	28.95%	2.37%	10.93%	3.01%	21.62%

Correlation

The correlation between MGK and BRK-B is -0.04, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.04
Correlation (3Y) Calculated over the trailing 3-year period	0.17
Correlation (5Y) Calculated over the trailing 5-year period	0.36
Correlation (10Y) Calculated over the trailing 10-year period	0.43
Correlation (All Time) Calculated using the full available price history since Dec 27, 2007	0.53

The correlation between MGK and BRK-B shifts across timeframes, from -0.04 (1 year) to 0.53 (all time), reflecting how their relationship changes across market environments.

Return for Risk

MGK vs. BRK-B — Risk / Return Rank

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

MGK

MGK Risk / Return Rank: 36
MGK Sharpe Ratio Rank: 39
MGK Sortino Ratio Rank: 38
MGK Omega Ratio Rank: 38
MGK Calmar Ratio Rank: 29
MGK Martin Ratio Rank: 33

BRK-B

BRK-B Risk / Return Rank: 46
BRK-B Sharpe Ratio Rank: 49
BRK-B Sortino Ratio Rank: 40
BRK-B Omega Ratio Rank: 40
BRK-B Calmar Ratio Rank: 50
BRK-B Martin Ratio Rank: 49

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. BRK-B - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap Growth ETF (MGK) and Berkshire Hathaway Inc. (BRK-B). 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	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	1.25	0.14	+1.11
Sortino ratio: Return per unit of downside risk	1.77	0.30	+1.47
Omega ratio: Gain probability vs. loss probability	1.22	1.04	+0.19
Calmar ratio: Return relative to maximum drawdown	1.30	0.22	+1.08
Martin ratio: Return relative to average drawdown	4.25	0.47	+3.79

MGK vs. BRK-B - Sharpe Ratio Comparison

The current MGK Sharpe Ratio is 1.25, which is higher than the BRK-B Sharpe Ratio of 0.14. The chart below compares the historical Sharpe Ratios of MGK and BRK-B, 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. BRK-B - Drawdown Comparison

The maximum MGK drawdown since its inception was -48.43%, smaller than the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for MGK and BRK-B.

Drawdown Indicators

	MGK	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-48.43%	-53.86%	+5.43%
Max Drawdown (1Y) Largest decline over 1 year	-16.85%	-9.42%	-7.43%
Max Drawdown (3Y) Largest decline over 3 years	-23.36%	-14.95%	-8.41%
Max Drawdown (5Y) Largest decline over 5 years	-36.01%	-26.58%	-9.43%
Max Drawdown (10Y) Largest decline over 10 years	-36.01%	-29.57%	-6.44%
Current Drawdown Current decline from peak	-4.41%	-7.42%	+3.01%
Average Drawdown Average peak-to-trough decline	-7.58%	-11.07%	+3.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.13%	4.52%	+0.61%

Volatility

MGK vs. BRK-B - Volatility Comparison

Vanguard Mega Cap Growth ETF (MGK) has a higher volatility of 7.58% compared to Berkshire Hathaway Inc. (BRK-B) at 4.09%. This indicates that MGK's price experiences larger fluctuations and is considered to be riskier than BRK-B based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGK	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.58%	4.09%	+3.49%
Volatility (6M) Calculated over the trailing 6-month period	14.01%	10.78%	+3.23%
Volatility (1Y) Calculated over the trailing 1-year period	17.49%	14.53%	+2.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.84%	17.13%	+5.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.95%	19.39%	+2.56%

Dividends

MGK vs. BRK-B - Dividend Comparison

MGK's dividend yield for the trailing twelve months is around 0.33%, while BRK-B has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BRK-B Berkshire Hathaway Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MGK Vanguard Mega Cap Growth ETF	0.33%	0.35%	0.43%	0.50%	0.70%	0.41%	0.65%	0.85%	1.12%	1.23%	1.53%	1.43%

Frequently Asked Questions

Can I hold both MGK and BRK-B in my portfolio?

MGK and BRK-B have a correlation of -0.04, 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 BRK-B?

MGK has higher volatility (7.58%) compared to BRK-B (4.09%). In terms of maximum drawdown, MGK dropped -48.43% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

MGK currently has the higher Sharpe Ratio (1.25 vs 0.14), 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.