FGRTX vs. ARKK

Last updated Jun 13, 2026

FGRTX (Fidelity Mega Cap Stock Fund) and ARKK (ARK Innovation ETF) are both funds - FGRTX is a Large Cap Blend Equities fund actively managed by Fidelity, while ARKK is a Technology Equities fund actively managed by ARK. Both are actively managed. Over the past 10 years, FGRTX returned 16.46%/yr vs 15.57%/yr for ARKK. A 0.61 correlation means they provide meaningful diversification when combined. FGRTX charges 0.58%/yr vs 0.75%/yr for ARKK.

Performance

FGRTX vs. ARKK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Mega Cap Stock Fund (FGRTX) and ARK Innovation ETF (ARKK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FGRTX achieves a 8.35% return, which is significantly higher than ARKK's -1.65% return. Over the past 10 years, FGRTX has outperformed ARKK with an annualized return of 16.46%, while ARKK has yielded a comparatively lower 15.57% annualized return.

FGRTX

• 1D: 1.62%
• 1M: -1.08%
• YTD: 8.35%
• 6M: 9.78%
• 1Y: 26.75%
• 3Y*: 24.44%
• 5Y*: 15.83%
• 10Y*: 16.46%

ARKK

• 1D: 0.25%
• 1M: -3.07%
• YTD: -1.65%
• 6M: -5.90%
• 1Y: 21.98%
• 3Y*: 19.87%
• 5Y*: -7.96%
• 10Y*: 15.57%

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

FGRTX vs. ARKK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FGRTX Fidelity Mega Cap Stock Fund	8.35%	26.92%	25.98%	26.51%	-8.98%	26.29%	12.96%	31.07%	-7.44%	16.98%
ARKK ARK Innovation ETF	-1.65%	35.49%	8.40%	69.04%	-66.97%	-23.60%	152.71%	35.08%	3.52%	87.33%

Correlation

The correlation between FGRTX and ARKK is 0.70, 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	0.70
Correlation (3Y) Calculated over the trailing 3-year period	0.71
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (10Y) Calculated over the trailing 10-year period	0.62
Correlation (All Time) Calculated using the full available price history since Oct 31, 2014	0.61

The correlation between FGRTX and ARKK shifts across timeframes, from 0.61 (all time) to 0.71 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

FGRTX vs. ARKK — Risk / Return Rank

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

FGRTX

FGRTX Risk / Return Rank: 80
FGRTX Sharpe Ratio Rank: 80
FGRTX Sortino Ratio Rank: 77
FGRTX Omega Ratio Rank: 75
FGRTX Calmar Ratio Rank: 79
FGRTX Martin Ratio Rank: 87

ARKK

ARKK Risk / Return Rank: 20
ARKK Sharpe Ratio Rank: 21
ARKK Sortino Ratio Rank: 22
ARKK Omega Ratio Rank: 20
ARKK Calmar Ratio Rank: 19
ARKK Martin Ratio Rank: 17

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.

FGRTX vs. ARKK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Mega Cap Stock Fund (FGRTX) and ARK Innovation ETF (ARKK). 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.

	FGRTX	ARKK	Difference
Sharpe ratio: Return per unit of total volatility	2.17	0.61	+1.56
Sortino ratio: Return per unit of downside risk	2.98	1.06	+1.93
Omega ratio: Gain probability vs. loss probability	1.39	1.12	+0.27
Calmar ratio: Return relative to maximum drawdown	3.00	0.70	+2.29
Martin ratio: Return relative to average drawdown	13.36	1.53	+11.83

FGRTX vs. ARKK - Sharpe Ratio Comparison

The current FGRTX Sharpe Ratio is 2.17, which is higher than the ARKK Sharpe Ratio of 0.61. The chart below compares the historical Sharpe Ratios of FGRTX and ARKK, 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

FGRTX vs. ARKK - Drawdown Comparison

The maximum FGRTX drawdown since its inception was -56.17%, smaller than the maximum ARKK drawdown of -80.97%. Use the drawdown chart below to compare losses from any high point for FGRTX and ARKK.

Drawdown Indicators

	FGRTX	ARKK	Difference
Max Drawdown Largest peak-to-trough decline	-56.17%	-80.97%	+24.80%
Max Drawdown (1Y) Largest decline over 1 year	-8.99%	-31.35%	+22.36%
Max Drawdown (3Y) Largest decline over 3 years	-18.51%	-39.56%	+21.05%
Max Drawdown (5Y) Largest decline over 5 years	-23.35%	-77.23%	+53.88%
Max Drawdown (10Y) Largest decline over 10 years	-35.18%	-80.97%	+45.79%
Current Drawdown Current decline from peak	-2.25%	-51.01%	+48.76%
Average Drawdown Average peak-to-trough decline	-8.71%	-30.16%	+21.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.01%	14.39%	-12.38%

Volatility

FGRTX vs. ARKK - Volatility Comparison

The current volatility for Fidelity Mega Cap Stock Fund (FGRTX) is 4.04%, while ARK Innovation ETF (ARKK) has a volatility of 11.81%. This indicates that FGRTX experiences smaller price fluctuations and is considered to be less risky than ARKK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FGRTX	ARKK	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.04%	11.81%	-7.77%
Volatility (6M) Calculated over the trailing 6-month period	9.65%	26.30%	-16.65%
Volatility (1Y) Calculated over the trailing 1-year period	12.42%	36.28%	-23.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.77%	46.40%	-29.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.14%	40.34%	-22.20%

FGRTX vs. ARKK - Expense Ratio Comparison

FGRTX has a 0.58% expense ratio, which is lower than ARKK's 0.75% expense ratio.

Dividends

FGRTX vs. ARKK - Dividend Comparison

FGRTX's dividend yield for the trailing twelve months is around 3.59%, while ARKK has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ARKK ARK Innovation ETF	0.00%	0.00%	0.00%	0.70%	0.00%	0.55%	1.64%	0.38%	3.14%	1.32%	0.00%	2.27%
FGRTX Fidelity Mega Cap Stock Fund	3.59%	3.89%	2.68%	2.06%	4.38%	4.79%	7.96%	12.98%	21.72%	15.57%	1.97%	4.16%

Frequently Asked Questions

Can I hold both FGRTX and ARKK in my portfolio?

FGRTX and ARKK have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FGRTX or ARKK?

ARKK has higher volatility (11.81%) compared to FGRTX (4.04%). In terms of maximum drawdown, FGRTX dropped -56.17% vs ARKK's -80.97%.

Which has better risk-adjusted returns?

FGRTX currently has the higher Sharpe Ratio (2.17 vs 0.61), 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.