FBGKX vs. MGK

Last updated Jun 23, 2026

FBGKX (Fidelity Blue Chip Growth Fund Class K) and MGK (Vanguard Mega Cap Growth ETF) are both Large Cap Growth Equities funds. FBGKX is actively managed, while MGK is passively managed. Over the past 10 years, FBGKX returned 22.33%/yr vs 19.23%/yr for MGK. With a 0.96 correlation, they move nearly in lockstep. FBGKX charges 0.54%/yr vs 0.05%/yr for MGK.

Performance

FBGKX vs. MGK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Blue Chip Growth Fund Class K (FBGKX) and Vanguard Mega Cap Growth ETF (MGK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FBGKX achieves a 19.08% return, which is significantly higher than MGK's 5.89% return. Over the past 10 years, FBGKX has outperformed MGK with an annualized return of 22.33%, while MGK has yielded a comparatively lower 19.23% annualized return.

FBGKX

• 1D: 2.03%
• 1M: 4.79%
• YTD: 19.08%
• 6M: 18.68%
• 1Y: 44.43%
• 3Y*: 31.34%
• 5Y*: 16.41%
• 10Y*: 22.33%

MGK

• 1D: -1.39%
• 1M: -1.85%
• YTD: 5.89%
• 6M: 5.30%
• 1Y: 25.90%
• 3Y*: 24.22%
• 5Y*: 14.43%
• 10Y*: 19.23%

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

FBGKX vs. MGK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FBGKX Fidelity Blue Chip Growth Fund Class K	19.08%	19.99%	39.87%	55.76%	-38.40%	22.74%	62.35%	33.56%	1.11%	36.08%
MGK Vanguard Mega Cap Growth ETF	5.89%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%

Correlation

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

Return for Risk

FBGKX vs. MGK — Risk / Return Rank

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

FBGKX

FBGKX Risk / Return Rank: 74
FBGKX Sharpe Ratio Rank: 77
FBGKX Sortino Ratio Rank: 64
FBGKX Omega Ratio Rank: 63
FBGKX Calmar Ratio Rank: 81
FBGKX Martin Ratio Rank: 83

MGK

MGK Risk / Return Rank: 39
MGK Sharpe Ratio Rank: 44
MGK Sortino Ratio Rank: 42
MGK Omega Ratio Rank: 41
MGK Calmar Ratio Rank: 32
MGK Martin Ratio Rank: 35

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.

FBGKX vs. MGK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Blue Chip Growth Fund Class K (FBGKX) and Vanguard Mega Cap Growth ETF (MGK). 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.

	FBGKX	MGK	Difference
Sharpe ratio: Return per unit of total volatility	2.35	1.51	+0.84
Sortino ratio: Return per unit of downside risk	3.04	2.08	+0.97
Omega ratio: Gain probability vs. loss probability	1.40	1.26	+0.14
Calmar ratio: Return relative to maximum drawdown	3.49	1.54	+1.95
Martin ratio: Return relative to average drawdown	14.40	5.19	+9.21

FBGKX vs. MGK - Sharpe Ratio Comparison

The current FBGKX Sharpe Ratio is 2.35, which is higher than the MGK Sharpe Ratio of 1.51. The chart below compares the historical Sharpe Ratios of FBGKX and MGK, 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

FBGKX vs. MGK - Drawdown Comparison

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

Drawdown Indicators

	FBGKX	MGK	Difference
Max Drawdown Largest peak-to-trough decline	-48.90%	-48.43%	-0.47%
Max Drawdown (1Y) Largest decline over 1 year	-12.63%	-16.85%	+4.22%
Max Drawdown (3Y) Largest decline over 3 years	-27.06%	-23.36%	-3.70%
Max Drawdown (5Y) Largest decline over 5 years	-43.03%	-36.01%	-7.02%
Max Drawdown (10Y) Largest decline over 10 years	-43.03%	-36.01%	-7.02%
Current Drawdown Current decline from peak	-0.35%	-5.13%	+4.78%
Average Drawdown Average peak-to-trough decline	-8.34%	-7.58%	-0.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.05%	5.00%	-1.95%

Volatility

FBGKX vs. MGK - Volatility Comparison

Fidelity Blue Chip Growth Fund Class K (FBGKX) has a higher volatility of 7.86% compared to Vanguard Mega Cap Growth ETF (MGK) at 6.78%. This indicates that FBGKX's price experiences larger fluctuations and is considered to be riskier than MGK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FBGKX	MGK	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.86%	6.78%	+1.08%
Volatility (6M) Calculated over the trailing 6-month period	14.72%	13.63%	+1.09%
Volatility (1Y) Calculated over the trailing 1-year period	18.75%	17.22%	+1.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	25.06%	22.78%	+2.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.77%	21.97%	+1.80%

FBGKX vs. MGK - Expense Ratio Comparison

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

Dividends

FBGKX vs. MGK - Dividend Comparison

FBGKX's dividend yield for the trailing twelve months is around 1.59%, more than MGK's 0.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBGKX Fidelity Blue Chip Growth Fund Class K	1.59%	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	0.33%	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 FBGKX and MGK in my portfolio?

With a correlation of 0.95, FBGKX and MGK 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, FBGKX or MGK?

FBGKX has higher volatility (7.86%) compared to MGK (6.78%). In terms of maximum drawdown, FBGKX dropped -48.90% vs MGK's -48.43%.

Which has better risk-adjusted returns?

FBGKX currently has the higher Sharpe Ratio (2.35 vs 1.51), 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.