FGKFX vs. FSPGX

Last updated Jun 4, 2026

FGKFX (Fidelity Growth Company K6 Fund) and FSPGX (Fidelity Large Cap Growth Index Fund) are both Large Cap Growth Equities funds from Fidelity. Over the past 5 years, FGKFX returned 18.14%/yr vs 16.03%/yr for FSPGX. With a 0.96 correlation, they move nearly in lockstep. FGKFX charges 0.45%/yr vs 0.04%/yr for FSPGX.

Performance

FGKFX vs. FSPGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Growth Company K6 Fund (FGKFX) and Fidelity Large Cap Growth Index Fund (FSPGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FGKFX achieves a 24.68% return, which is significantly higher than FSPGX's 8.60% return.

FGKFX

• 1D: 0.15%
• 1M: 8.90%
• YTD: 24.68%
• 6M: 21.97%
• 1Y: 52.34%
• 3Y*: 32.84%
• 5Y*: 18.14%
• 10Y*: —

FSPGX

• 1D: -0.38%
• 1M: 7.10%
• YTD: 8.60%
• 6M: 7.98%
• 1Y: 27.43%
• 3Y*: 25.53%
• 5Y*: 16.03%
• 10Y*: —

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

FGKFX vs. FSPGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FGKFX Fidelity Growth Company K6 Fund	24.68%	21.67%	35.46%	46.02%	-32.62%	22.06%	68.76%	15.07%
FSPGX Fidelity Large Cap Growth Index Fund	8.60%	18.54%	33.27%	42.77%	-29.17%	27.57%	38.46%	14.03%

Correlation

The correlation between FGKFX and FSPGX is 0.94, 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	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (All Time) Calculated using the full available price history since Jun 14, 2019	0.96

The correlation between FGKFX and FSPGX has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

Return for Risk

FGKFX vs. FSPGX — Risk / Return Rank

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

FGKFX

FGKFX Risk / Return Rank: 84
FGKFX Sharpe Ratio Rank: 89
FGKFX Sortino Ratio Rank: 74
FGKFX Omega Ratio Rank: 73
FGKFX Calmar Ratio Rank: 91
FGKFX Martin Ratio Rank: 92

FSPGX

FSPGX Risk / Return Rank: 32
FSPGX Sharpe Ratio Rank: 41
FSPGX Sortino Ratio Rank: 36
FSPGX Omega Ratio Rank: 37
FSPGX Calmar Ratio Rank: 22
FSPGX Martin Ratio Rank: 23

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.

FGKFX vs. FSPGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Growth Company K6 Fund (FGKFX) and Fidelity Large Cap Growth Index Fund (FSPGX). 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.

	FGKFX	FSPGX	Difference
Sharpe ratio: Return per unit of total volatility	2.93	1.85	+1.08
Sortino ratio: Return per unit of downside risk	3.58	2.50	+1.08
Omega ratio: Gain probability vs. loss probability	1.48	1.32	+0.16
Calmar ratio: Return relative to maximum drawdown	4.78	1.76	+3.02
Martin ratio: Return relative to average drawdown	19.19	5.90	+13.29
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FGKFX vs. FSPGX - Sharpe Ratio Comparison

The current FGKFX Sharpe Ratio is 2.93, which is higher than the FSPGX Sharpe Ratio of 1.85. The chart below compares the historical Sharpe Ratios of FGKFX and FSPGX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FGKFX	FSPGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.93	1.85	+1.08
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.76	0.75	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.98	0.90	+0.09

Drawdowns

FGKFX vs. FSPGX - Drawdown Comparison

The maximum FGKFX drawdown since its inception was -40.14%, which is greater than FSPGX's maximum drawdown of -32.66%. Use the drawdown chart below to compare losses from any high point for FGKFX and FSPGX.

Drawdown Indicators

	FGKFX	FSPGX	Difference
Max Drawdown Largest peak-to-trough decline	-40.14%	-32.66%	-7.48%
Max Drawdown (1Y) Largest decline over 1 year	-11.40%	-16.17%	+4.77%
Max Drawdown (3Y) Largest decline over 3 years	-27.38%	-23.32%	-4.06%
Max Drawdown (5Y) Largest decline over 5 years	-40.14%	-32.66%	-7.48%
Current Drawdown Current decline from peak	0.00%	-0.38%	+0.38%
Average Drawdown Average peak-to-trough decline	-10.02%	-6.37%	-3.65%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.83%	4.81%	-1.98%

Volatility

FGKFX vs. FSPGX - Volatility Comparison

Fidelity Growth Company K6 Fund (FGKFX) has a higher volatility of 4.46% compared to Fidelity Large Cap Growth Index Fund (FSPGX) at 3.32%. This indicates that FGKFX's price experiences larger fluctuations and is considered to be riskier than FSPGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FGKFX	FSPGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.46%	3.32%	+1.14%
Volatility (6M) Calculated over the trailing 6-month period	14.29%	11.58%	+2.71%
Volatility (1Y) Calculated over the trailing 1-year period	18.60%	15.39%	+3.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.14%	21.49%	+2.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.74%	21.55%	+4.19%

FGKFX vs. FSPGX - Expense Ratio Comparison

FGKFX has a 0.45% expense ratio, which is higher than FSPGX's 0.04% expense ratio.

Dividends

FGKFX vs. FSPGX - Dividend Comparison

FGKFX has not paid dividends to shareholders, while FSPGX's dividend yield for the trailing twelve months is around 0.32%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FGKFX Fidelity Growth Company K6 Fund	0.00%	0.00%	0.00%	0.10%	0.18%	2.64%	0.93%	0.06%	0.00%	0.00%
FSPGX Fidelity Large Cap Growth Index Fund	0.32%	0.34%	0.37%	0.73%	0.86%	2.22%	1.76%	1.04%	1.32%	0.22%

Frequently Asked Questions

Can I hold both FGKFX and FSPGX in my portfolio?

With a correlation of 0.94, FGKFX and FSPGX 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, FGKFX or FSPGX?

FGKFX has higher volatility (4.46%) compared to FSPGX (3.32%). In terms of maximum drawdown, FGKFX dropped -40.14% vs FSPGX's -32.66%.

Which has better risk-adjusted returns?

FGKFX currently has the higher Sharpe Ratio (2.93 vs 1.85), 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.