FSPGX vs. FGCKX

Last updated Aug 5, 2026

FSPGX (Fidelity Large Cap Growth Index Fund) and FGCKX (Fidelity Growth Company Fund Class K) are both Large Cap Growth Equities funds from Fidelity. Over the past 5 years, FSPGX returned 12.19%/yr vs 14.48%/yr for FGCKX. Their 0.95 correlation means they have historically moved very closely together. FSPGX charges 0.04%/yr vs 0.62%/yr for FGCKX.

Performance

FSPGX vs. FGCKX - Performance Comparison

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

Returns By Period

In the year-to-date period, FSPGX achieves a 2.47% return, which is significantly lower than FGCKX's 18.66% return.

FSPGX

• 1D: 2.16%
• 1M: -0.32%
• 6M: 5.57%
• YTD: 2.47%
• 1Y: 10.34%
• 3Y*: 21.32%
• 5Y*: 12.19%
• 10Y*: —
• ALL TIME*: 18.16%

FGCKX

• 1D: 2.36%
• 1M: -1.50%
• 6M: 15.42%
• YTD: 18.66%
• 1Y: 29.19%
• 3Y*: 28.07%
• 5Y*: 14.48%
• 10Y*: 21.87%
• ALL TIME*: 16.38%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
FGCKX Fidelity Growth Company Fund Class K	$0.00	$0.00	$0.00
FSPGX Fidelity Large Cap Growth Index Fund	$0.00	$0.00	$0.00

FSPGX vs. FGCKX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSPGX Fidelity Large Cap Growth Index Fund	2.47%	18.54%	33.27%	42.77%	-29.17%	27.57%	38.46%	36.38%	-1.79%	27.70%
FGCKX Fidelity Growth Company Fund Class K	18.66%	18.67%	37.30%	47.35%	-33.82%	22.62%	67.61%	38.50%	-4.07%	36.89%

Correlation

The correlation between FSPGX and FGCKX is 0.94, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.94
Correlation (3Y) Balances recent behavior with more history.	0.96
Correlation (5Y) Shows whether the relationship held over a longer period.	0.97
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.95

The correlation between FSPGX and FGCKX has been stable across timeframes, ranging from 0.94 to 0.97 - a consistent structural relationship.

Return for Risk

FSPGX vs. FGCKX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

FSPGX

FSPGX Risk / Return Rank: 17
FSPGX Sharpe Ratio Rank: 18
FSPGX Sortino Ratio Rank: 18
FSPGX Omega Ratio Rank: 17
FSPGX Calmar Ratio Rank: 15
FSPGX Martin Ratio Rank: 16

FGCKX

FGCKX Risk / Return Rank: 57
FGCKX Sharpe Ratio Rank: 56
FGCKX Sortino Ratio Rank: 47
FGCKX Omega Ratio Rank: 46
FGCKX Calmar Ratio Rank: 74
FGCKX Martin Ratio Rank: 60

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

FSPGX vs. FGCKX - Risk-Adjusted Trends Comparison

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

	FSPGX	FGCKX	Difference
Sharpe ratio: Return per unit of total volatility	0.72	1.56	-0.85
Sortino ratio: Return per unit of downside risk	1.09	2.09	-1.00
Omega ratio: Gain probability vs. loss probability	1.13	1.27	-0.14
Calmar ratio: Return relative to maximum drawdown	0.78	2.57	-1.79
Martin ratio: Return relative to average drawdown	2.31	8.56	-6.25

FSPGX vs. FGCKX - Sharpe Ratio Comparison

The current FSPGX Sharpe Ratio is 0.72, which is lower than the FGCKX Sharpe Ratio of 1.56. The chart below compares the historical Sharpe Ratios of FSPGX and FGCKX, 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

FSPGX vs. FGCKX - Drawdown Comparison

The maximum FSPGX drawdown since its inception was -32.66%, smaller than the maximum FGCKX drawdown of -51.01%. Use the drawdown chart below to compare losses from any high point for FSPGX and FGCKX.

Drawdown Indicators

	FSPGX	FGCKX	Difference
Max Drawdown Largest peak-to-trough decline	-32.66%	-51.01%	+18.35%
Max Drawdown (1Y) Largest decline over 1 year	-16.17%	-12.55%	-3.62%
Max Drawdown (3Y) Largest decline over 3 years	-23.32%	-26.20%	+2.88%
Max Drawdown (5Y) Largest decline over 5 years	-32.66%	-40.21%	+7.55%
Max Drawdown (10Y) Largest decline over 10 years	—	-40.21%	—
Current Drawdown Current decline from peak	-6.00%	-4.14%	-1.86%
Average Drawdown Average peak-to-trough decline	-6.36%	-8.91%	+2.55%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.42%	3.75%	+1.67%

Volatility

FSPGX vs. FGCKX - Volatility Comparison

Fidelity Large Cap Growth Index Fund (FSPGX) and Fidelity Growth Company Fund Class K (FGCKX) have volatilities of 6.70% and 6.67%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSPGX	FGCKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.70%	6.67%	+0.03%
Volatility (6M) Calculated over the trailing 6-month period	14.18%	16.04%	-1.86%
Volatility (1Y) Calculated over the trailing 1-year period	17.56%	20.63%	-3.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.83%	24.37%	-2.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.58%	23.56%	-1.98%

FSPGX vs. FGCKX - Expense Ratio Comparison

FSPGX has a 0.04% expense ratio, which is lower than FGCKX's 0.62% expense ratio.

Dividends

FSPGX vs. FGCKX - Dividend Comparison

FSPGX's dividend yield for the trailing twelve months is around 0.38%, while FGCKX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FGCKX Fidelity Growth Company Fund Class K	0.00%	0.00%	8.80%	3.81%	7.16%	10.63%	8.83%	3.84%	6.38%	4.73%	6.20%	3.96%
FSPGX Fidelity Large Cap Growth Index Fund	0.38%	0.34%	0.37%	0.73%	0.86%	2.22%	1.76%	1.04%	1.32%	0.22%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSPGX and FGCKX in my portfolio?

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

FSPGX has higher volatility (6.70%) compared to FGCKX (6.67%). In terms of maximum drawdown, FSPGX dropped -32.66% vs FGCKX's -51.01%.

Which has better risk-adjusted returns?

FGCKX currently has the higher Sharpe Ratio (1.56 vs 0.72), 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.