FIDEX vs. FZALX

Last updated Jun 4, 2026

FIDEX (Fidelity SAI Sustainable U.S. Equity Fund) and FZALX (Fidelity Advisor Mega Cap Stock Fund Class Z) are both Large Cap Blend Equities funds from Fidelity. Over the past 3 years, FIDEX returned 20.90%/yr vs 25.73%/yr for FZALX. Their correlation of 0.94 suggests significant overlap in exposure. FIDEX charges 0.56%/yr vs 0.51%/yr for FZALX.

Performance

FIDEX vs. FZALX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FIDEX achieves a 13.79% return, which is significantly higher than FZALX's 10.54% return.

FIDEX

• 1D: 0.42%
• 1M: 6.15%
• YTD: 13.79%
• 6M: 13.98%
• 1Y: 32.88%
• 3Y*: 20.90%
• 5Y*: —
• 10Y*: —

FZALX

• 1D: -0.32%
• 1M: 3.44%
• YTD: 10.54%
• 6M: 12.47%
• 1Y: 31.53%
• 3Y*: 25.73%
• 5Y*: 16.44%
• 10Y*: 16.71%

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

FIDEX vs. FZALX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	13.79%	15.80%	21.44%	24.99%	-8.88%
FZALX Fidelity Advisor Mega Cap Stock Fund Class Z	10.54%	27.07%	26.13%	26.63%	-4.53%

Correlation

The correlation between FIDEX and FZALX 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 (All Time) Calculated using the full available price history since Apr 26, 2022	0.94

The correlation between FIDEX and FZALX has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.

Return for Risk

FIDEX vs. FZALX — Risk / Return Rank

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

FIDEX

FIDEX Risk / Return Rank: 70
FIDEX Sharpe Ratio Rank: 69
FIDEX Sortino Ratio Rank: 63
FIDEX Omega Ratio Rank: 60
FIDEX Calmar Ratio Rank: 73
FIDEX Martin Ratio Rank: 84

FZALX

FZALX Risk / Return Rank: 81
FZALX Sharpe Ratio Rank: 84
FZALX Sortino Ratio Rank: 78
FZALX Omega Ratio Rank: 75
FZALX Calmar Ratio Rank: 80
FZALX Martin Ratio Rank: 86

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.

FIDEX vs. FZALX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) and Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX). 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.

	FIDEX	FZALX	Difference
Sharpe ratio: Return per unit of total volatility	2.43	2.71	-0.28
Sortino ratio: Return per unit of downside risk	3.33	3.72	-0.39
Omega ratio: Gain probability vs. loss probability	1.43	1.49	-0.06
Calmar ratio: Return relative to maximum drawdown	3.33	3.61	-0.28
Martin ratio: Return relative to average drawdown	15.95	16.39	-0.44
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FIDEX vs. FZALX - Sharpe Ratio Comparison

The current FIDEX Sharpe Ratio is 2.43, which is comparable to the FZALX Sharpe Ratio of 2.71. The chart below compares the historical Sharpe Ratios of FIDEX and FZALX, 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

	FIDEX	FZALX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.43	2.71	-0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.99	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.92	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.86	0.86	0.00

Drawdowns

FIDEX vs. FZALX - Drawdown Comparison

The maximum FIDEX drawdown since its inception was -21.90%, smaller than the maximum FZALX drawdown of -35.23%. Use the drawdown chart below to compare losses from any high point for FIDEX and FZALX.

Drawdown Indicators

	FIDEX	FZALX	Difference
Max Drawdown Largest peak-to-trough decline	-21.90%	-35.23%	+13.33%
Max Drawdown (1Y) Largest decline over 1 year	-10.13%	-8.99%	-1.14%
Max Drawdown (3Y) Largest decline over 3 years	-21.90%	-18.49%	-3.41%
Max Drawdown (5Y) Largest decline over 5 years	—	-23.25%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-35.23%	—
Current Drawdown Current decline from peak	0.00%	-0.32%	+0.32%
Average Drawdown Average peak-to-trough decline	-3.70%	-3.78%	+0.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.11%	1.98%	+0.13%

Volatility

FIDEX vs. FZALX - Volatility Comparison

Fidelity SAI Sustainable U.S. Equity Fund (FIDEX) has a higher volatility of 3.92% compared to Fidelity Advisor Mega Cap Stock Fund Class Z (FZALX) at 2.73%. This indicates that FIDEX's price experiences larger fluctuations and is considered to be riskier than FZALX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FIDEX	FZALX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.92%	2.73%	+1.19%
Volatility (6M) Calculated over the trailing 6-month period	10.80%	9.06%	+1.74%
Volatility (1Y) Calculated over the trailing 1-year period	13.86%	11.98%	+1.88%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.47%	16.70%	+1.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.47%	18.14%	+0.33%

FIDEX vs. FZALX - Expense Ratio Comparison

FIDEX has a 0.56% expense ratio, which is higher than FZALX's 0.51% expense ratio.

Dividends

FIDEX vs. FZALX - Dividend Comparison

FIDEX's dividend yield for the trailing twelve months is around 1.38%, less than FZALX's 3.65% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIDEX Fidelity SAI Sustainable U.S. Equity Fund	1.38%	1.64%	1.87%	0.46%	0.63%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
FZALX Fidelity Advisor Mega Cap Stock Fund Class Z	3.65%	4.04%	2.83%	2.17%	4.51%	4.92%	8.14%	13.19%	21.94%	16.56%	2.12%	4.33%

Frequently Asked Questions

Can I hold both FIDEX and FZALX in my portfolio?

With a correlation of 0.93, FIDEX and FZALX 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, FIDEX or FZALX?

FIDEX has higher volatility (3.92%) compared to FZALX (2.73%). In terms of maximum drawdown, FIDEX dropped -21.90% vs FZALX's -35.23%.

Which has better risk-adjusted returns?

FZALX currently has the higher Sharpe Ratio (2.71 vs 2.43), 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.