MGK vs. FBGKX

Last updated Jun 24, 2026

MGK (Vanguard Mega Cap Growth ETF) and FBGKX (Fidelity Blue Chip Growth Fund Class K) are both Large Cap Growth Equities funds. MGK is passively managed, while FBGKX is actively managed. Over the past 10 years, MGK returned 18.97%/yr vs 22.48%/yr for FBGKX. With a 0.96 correlation, they move nearly in lockstep. MGK charges 0.05%/yr vs 0.54%/yr for FBGKX.

Performance

MGK vs. FBGKX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mega Cap Growth ETF (MGK) and Fidelity Blue Chip Growth Fund Class K (FBGKX). 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 FBGKX's 16.87% return. Over the past 10 years, MGK has underperformed FBGKX with an annualized return of 18.97%, while FBGKX has yielded a comparatively higher 22.48% 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%

FBGKX

• 1D: -1.86%
• 1M: 2.84%
• YTD: 16.87%
• 6M: 15.63%
• 1Y: 40.81%
• 3Y*: 30.94%
• 5Y*: 15.42%
• 10Y*: 22.48%

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

MGK vs. FBGKX - 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%
FBGKX Fidelity Blue Chip Growth Fund Class K	16.87%	19.99%	39.87%	55.76%	-38.40%	22.74%	62.35%	33.56%	1.11%	36.08%

Correlation

The correlation between MGK and FBGKX is 0.95, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since May 15, 2008	0.96

The correlation between MGK and FBGKX has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.

Return for Risk

MGK vs. FBGKX — 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

FBGKX

FBGKX Risk / Return Rank: 68
FBGKX Sharpe Ratio Rank: 70
FBGKX Sortino Ratio Rank: 57
FBGKX Omega Ratio Rank: 57
FBGKX Calmar Ratio Rank: 78
FBGKX Martin Ratio Rank: 79

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. FBGKX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap Growth ETF (MGK) and Fidelity Blue Chip Growth Fund Class K (FBGKX). 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	FBGKX	Difference
Sharpe ratio: Return per unit of total volatility	1.26	2.24	-0.98
Sortino ratio: Return per unit of downside risk	1.76	2.90	-1.15
Omega ratio: Gain probability vs. loss probability	1.22	1.38	-0.16
Calmar ratio: Return relative to maximum drawdown	1.29	3.34	-2.05
Martin ratio: Return relative to average drawdown	4.31	13.74	-9.43

MGK vs. FBGKX - Sharpe Ratio Comparison

The current MGK Sharpe Ratio is 1.26, which is lower than the FBGKX Sharpe Ratio of 2.24. The chart below compares the historical Sharpe Ratios of MGK and FBGKX, 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. FBGKX - Drawdown Comparison

The maximum MGK drawdown since its inception was -48.43%, roughly equal to the maximum FBGKX drawdown of -48.90%. Use the drawdown chart below to compare losses from any high point for MGK and FBGKX.

Drawdown Indicators

	MGK	FBGKX	Difference
Max Drawdown Largest peak-to-trough decline	-48.43%	-48.90%	+0.47%
Max Drawdown (1Y) Largest decline over 1 year	-16.85%	-12.63%	-4.22%
Max Drawdown (3Y) Largest decline over 3 years	-23.36%	-27.06%	+3.70%
Max Drawdown (5Y) Largest decline over 5 years	-36.01%	-43.03%	+7.02%
Max Drawdown (10Y) Largest decline over 10 years	-36.01%	-43.03%	+7.02%
Current Drawdown Current decline from peak	-7.14%	-2.20%	-4.94%
Average Drawdown Average peak-to-trough decline	-7.58%	-8.34%	+0.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.02%	3.05%	+1.97%

Volatility

MGK vs. FBGKX - Volatility Comparison

The current volatility for Vanguard Mega Cap Growth ETF (MGK) is 7.08%, while Fidelity Blue Chip Growth Fund Class K (FBGKX) has a volatility of 8.03%. This indicates that MGK experiences smaller price fluctuations and is considered to be less risky than FBGKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGK	FBGKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.08%	8.03%	-0.95%
Volatility (6M) Calculated over the trailing 6-month period	13.75%	14.86%	-1.11%
Volatility (1Y) Calculated over the trailing 1-year period	17.33%	18.88%	-1.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.80%	25.08%	-2.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.96%	23.79%	-1.83%

MGK vs. FBGKX - Expense Ratio Comparison

MGK has a 0.05% expense ratio, which is lower than FBGKX's 0.54% expense ratio.

Dividends

MGK vs. FBGKX - Dividend Comparison

MGK's dividend yield for the trailing twelve months is around 0.34%, less than FBGKX's 1.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBGKX Fidelity Blue Chip Growth Fund Class K	1.62%	1.89%	6.00%	0.93%	0.56%	8.77%	6.41%	3.70%	6.41%	4.26%	4.22%	5.36%
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%

Frequently Asked Questions

Can I hold both MGK and FBGKX in my portfolio?

With a correlation of 0.95, MGK and FBGKX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, MGK or FBGKX?

FBGKX has higher volatility (8.03%) compared to MGK (7.08%). In terms of maximum drawdown, MGK dropped -48.43% vs FBGKX's -48.90%.

Which has better risk-adjusted returns?

FBGKX currently has the higher Sharpe Ratio (2.24 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.