FNILX vs. FSPGX

Last updated Jun 23, 2026

FNILX (Fidelity ZERO Large Cap Index Fund) and FSPGX (Fidelity Large Cap Growth Index Fund) are both mutual funds - FNILX is a Large Cap Blend Equities fund managed by Fidelity, while FSPGX is a Large Cap Growth Equities fund managed by Fidelity. Over the past 5 years, FNILX returned 13.82%/yr vs 14.30%/yr for FSPGX. Their correlation of 0.95 suggests significant overlap in exposure. FNILX charges 0.00%/yr vs 0.04%/yr for FSPGX.

Performance

FNILX vs. FSPGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity ZERO Large Cap Index Fund (FNILX) 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, FNILX achieves a 10.04% return, which is significantly higher than FSPGX's 4.50% return.

FNILX

• 1D: 1.13%
• 1M: 0.71%
• YTD: 10.04%
• 6M: 9.55%
• 1Y: 26.85%
• 3Y*: 21.23%
• 5Y*: 13.82%
• 10Y*: —

FSPGX

• 1D: 1.38%
• 1M: -1.25%
• YTD: 4.50%
• 6M: 3.80%
• 1Y: 22.80%
• 3Y*: 22.67%
• 5Y*: 14.30%
• 10Y*: —

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

FNILX vs. FSPGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FNILX Fidelity ZERO Large Cap Index Fund	10.04%	17.81%	25.47%	27.45%	-19.37%	26.67%	21.13%	31.79%	-13.60%
FSPGX Fidelity Large Cap Growth Index Fund	4.50%	18.54%	33.27%	42.77%	-29.17%	27.57%	38.46%	36.38%	-15.99%

Correlation

The correlation between FNILX and FSPGX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 28, 2018	0.95

The correlation between FNILX and FSPGX has been stable across timeframes, ranging from 0.93 to 0.95 - a consistent structural relationship.

Return for Risk

FNILX vs. FSPGX — Risk / Return Rank

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

FNILX

FNILX Risk / Return Rank: 63
FNILX Sharpe Ratio Rank: 61
FNILX Sortino Ratio Rank: 55
FNILX Omega Ratio Rank: 57
FNILX Calmar Ratio Rank: 65
FNILX Martin Ratio Rank: 74

FSPGX

FSPGX Risk / Return Rank: 22
FSPGX Sharpe Ratio Rank: 26
FSPGX Sortino Ratio Rank: 24
FSPGX Omega Ratio Rank: 25
FSPGX Calmar Ratio Rank: 17
FSPGX Martin Ratio Rank: 19

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.

FNILX vs. FSPGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity ZERO Large Cap Index Fund (FNILX) 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.

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.

	FNILX	FSPGX	Difference
Sharpe ratio: Return per unit of total volatility	2.12	1.38	+0.74
Sortino ratio: Return per unit of downside risk	2.86	1.90	+0.95
Omega ratio: Gain probability vs. loss probability	1.38	1.24	+0.14
Calmar ratio: Return relative to maximum drawdown	2.96	1.37	+1.59
Martin ratio: Return relative to average drawdown	13.10	4.51	+8.59

FNILX vs. FSPGX - Sharpe Ratio Comparison

The current FNILX Sharpe Ratio is 2.12, which is higher than the FSPGX Sharpe Ratio of 1.38. The chart below compares the historical Sharpe Ratios of FNILX 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.

Drawdowns

FNILX vs. FSPGX - Drawdown Comparison

The maximum FNILX drawdown since its inception was -33.76%, roughly equal to the maximum FSPGX drawdown of -32.66%. Use the drawdown chart below to compare losses from any high point for FNILX and FSPGX.

Drawdown Indicators

	FNILX	FSPGX	Difference
Max Drawdown Largest peak-to-trough decline	-33.76%	-32.66%	-1.10%
Max Drawdown (1Y) Largest decline over 1 year	-9.01%	-16.17%	+7.16%
Max Drawdown (3Y) Largest decline over 3 years	-19.08%	-23.32%	+4.24%
Max Drawdown (5Y) Largest decline over 5 years	-25.40%	-32.66%	+7.26%
Current Drawdown Current decline from peak	-1.36%	-4.14%	+2.78%
Average Drawdown Average peak-to-trough decline	-5.35%	-6.36%	+1.01%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.03%	4.91%	-2.88%

Volatility

FNILX vs. FSPGX - Volatility Comparison

The current volatility for Fidelity ZERO Large Cap Index Fund (FNILX) is 4.91%, while Fidelity Large Cap Growth Index Fund (FSPGX) has a volatility of 5.97%. This indicates that FNILX experiences smaller price fluctuations and is considered to be less risky than FSPGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNILX	FSPGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.91%	5.97%	-1.06%
Volatility (6M) Calculated over the trailing 6-month period	9.97%	12.68%	-2.71%
Volatility (1Y) Calculated over the trailing 1-year period	12.58%	16.13%	-3.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.35%	21.60%	-4.25%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.04%	21.56%	-1.52%

FNILX vs. FSPGX - Expense Ratio Comparison

FNILX has a 0.00% expense ratio, which is lower than FSPGX's 0.04% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FNILX vs. FSPGX - Dividend Comparison

FNILX's dividend yield for the trailing twelve months is around 0.92%, more than FSPGX's 0.33% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
FNILX Fidelity ZERO Large Cap Index Fund	0.92%	1.01%	1.09%	1.34%	1.53%	0.95%	1.20%	1.17%	0.53%	0.00%
FSPGX Fidelity Large Cap Growth Index Fund	0.33%	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 FNILX and FSPGX in my portfolio?

With a correlation of 0.93, FNILX 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, FNILX or FSPGX?

FSPGX has higher volatility (5.97%) compared to FNILX (4.91%). In terms of maximum drawdown, FNILX dropped -33.76% vs FSPGX's -32.66%.

Which has better risk-adjusted returns?

FNILX currently has the higher Sharpe Ratio (2.12 vs 1.38), 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.