FNILX vs. FSDAX

Last updated Jul 21, 2026

FNILX (Fidelity ZERO Large Cap Index Fund) and FSDAX (Fidelity Select Defense & Aerospace Portfolio) are both mutual funds - FNILX is a Large Cap Blend Equities fund managed by Fidelity, while FSDAX is a Aerospace & Defense fund actively managed by Fidelity. Over the past 5 years, FNILX returned 12.82%/yr vs 18.31%/yr for FSDAX. A 0.65 correlation means they provide meaningful diversification when combined. FNILX charges 0.00%/yr vs 0.63%/yr for FSDAX.

Performance

FNILX vs. FSDAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity ZERO Large Cap Index Fund (FNILX) and Fidelity Select Defense & Aerospace Portfolio (FSDAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with FNILX having a 9.39% return and FSDAX slightly higher at 9.56%.

FNILX

• 1D: -1.00%
• 1M: -0.60%
• 6M: 7.97%
• YTD: 9.39%
• 1Y: 19.28%
• 3Y*: 19.60%
• 5Y*: 12.82%
• 10Y*: —
• ALL TIME*: 14.64%

FSDAX

• 1D: 0.00%
• 1M: -2.79%
• 6M: -2.37%
• YTD: 9.56%
• 1Y: 19.02%
• 3Y*: 28.15%
• 5Y*: 18.31%
• 10Y*: 15.46%
• ALL TIME*: 12.14%

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

FNILX vs. FSDAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
FNILX Fidelity ZERO Large Cap Index Fund	9.39%	17.81%	25.47%	27.45%	-19.37%	26.67%	21.13%	31.79%	-13.60%
FSDAX Fidelity Select Defense & Aerospace Portfolio	9.56%	50.03%	15.83%	16.29%	6.83%	4.91%	-7.87%	33.75%	-19.43%

Correlation

The correlation between FNILX and FSDAX is 0.57, 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	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.56
Correlation (5Y) Calculated over the trailing 5-year period	0.63
Correlation (All Time) Calculated using the full available price history since Sep 28, 2018	0.65

The correlation between FNILX and FSDAX has been stable across timeframes, ranging from 0.56 to 0.65 - a consistent structural relationship.

Return for Risk

FNILX vs. FSDAX — Risk / Return Rank

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

FNILX

FNILX Risk / Return Rank: 47
FNILX Sharpe Ratio Rank: 45
FNILX Sortino Ratio Rank: 42
FNILX Omega Ratio Rank: 43
FNILX Calmar Ratio Rank: 46
FNILX Martin Ratio Rank: 58

FSDAX

FSDAX Risk / Return Rank: 17
FSDAX Sharpe Ratio Rank: 16
FSDAX Sortino Ratio Rank: 17
FSDAX Omega Ratio Rank: 16
FSDAX Calmar Ratio Rank: 18
FSDAX 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.

FNILX vs. FSDAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity ZERO Large Cap Index Fund (FNILX) and Fidelity Select Defense & Aerospace Portfolio (FSDAX). 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	FSDAX	Difference
Sharpe ratio: Return per unit of total volatility	1.53	0.86	+0.67
Sortino ratio: Return per unit of downside risk	2.12	1.37	+0.75
Omega ratio: Gain probability vs. loss probability	1.28	1.16	+0.11
Calmar ratio: Return relative to maximum drawdown	2.16	1.20	+0.96
Martin ratio: Return relative to average drawdown	9.24	3.35	+5.89

FNILX vs. FSDAX - Sharpe Ratio Comparison

The current FNILX Sharpe Ratio is 1.53, which is higher than the FSDAX Sharpe Ratio of 0.86. The chart below compares the historical Sharpe Ratios of FNILX and FSDAX, 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. FSDAX - Drawdown Comparison

The maximum FNILX drawdown since its inception was -33.76%, smaller than the maximum FSDAX drawdown of -60.59%. Use the drawdown chart below to compare losses from any high point for FNILX and FSDAX.

Drawdown Indicators

	FNILX	FSDAX	Difference
Max Drawdown Largest peak-to-trough decline	-33.76%	-60.59%	+26.83%
Max Drawdown (1Y) Largest decline over 1 year	-9.01%	-16.13%	+7.12%
Max Drawdown (3Y) Largest decline over 3 years	-19.08%	-16.13%	-2.95%
Max Drawdown (5Y) Largest decline over 5 years	-25.40%	-21.90%	-3.50%
Max Drawdown (10Y) Largest decline over 10 years	—	-47.08%	—
Current Drawdown Current decline from peak	-1.95%	-7.77%	+5.82%
Average Drawdown Average peak-to-trough decline	-5.31%	-10.43%	+5.12%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.10%	5.75%	-3.65%

Volatility

FNILX vs. FSDAX - Volatility Comparison

The current volatility for Fidelity ZERO Large Cap Index Fund (FNILX) is 3.42%, while Fidelity Select Defense & Aerospace Portfolio (FSDAX) has a volatility of 5.76%. This indicates that FNILX experiences smaller price fluctuations and is considered to be less risky than FSDAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNILX	FSDAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.42%	5.76%	-2.34%
Volatility (6M) Calculated over the trailing 6-month period	10.11%	18.62%	-8.51%
Volatility (1Y) Calculated over the trailing 1-year period	12.72%	22.36%	-9.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.36%	20.67%	-3.31%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.97%	22.46%	-2.49%

FNILX vs. FSDAX - Expense Ratio Comparison

FNILX has a 0.00% expense ratio, which is lower than FSDAX's 0.63% expense ratio.

Dividends

FNILX vs. FSDAX - Dividend Comparison

FNILX's dividend yield for the trailing twelve months is around 0.93%, less than FSDAX's 2.08% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNILX Fidelity ZERO Large Cap Index Fund	0.93%	1.01%	1.09%	1.34%	1.53%	0.95%	1.20%	1.17%	0.53%	0.00%	0.00%	0.00%
FSDAX Fidelity Select Defense & Aerospace Portfolio	2.08%	4.48%	7.68%	6.47%	8.87%	8.38%	2.11%	2.62%	11.45%	3.57%	4.87%	6.30%

Frequently Asked Questions

Can I hold both FNILX and FSDAX in my portfolio?

FNILX and FSDAX have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FNILX or FSDAX?

FSDAX has higher volatility (5.76%) compared to FNILX (3.42%). In terms of maximum drawdown, FNILX dropped -33.76% vs FSDAX's -60.59%.

Which has better risk-adjusted returns?

FNILX currently has the higher Sharpe Ratio (1.53 vs 0.86), 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.