FSLY vs. HEI

Last updated Jun 5, 2026

FSLY (Fastly, Inc.) and HEI (HEICO Corporation) are both stocks. FSLY operates in Software - Application (Technology), while HEI operates in Aerospace & Defense (Industrials). Over the past 5 years, FSLY returned -15.89%/yr vs 17.93%/yr for HEI. At a 0.21 correlation, their price movements are largely independent.

Performance

FSLY vs. HEI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fastly, Inc. (FSLY) and HEICO Corporation (HEI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSLY achieves a 95.58% return, which is significantly higher than HEI's 2.94% return.

FSLY

• 1D: -4.42%
• 1M: -38.47%
• YTD: 95.58%
• 6M: 72.83%
• 1Y: 159.24%
• 3Y*: 6.55%
• 5Y*: -15.89%
• 10Y*: —

HEI

• 1D: 1.17%
• 1M: 20.06%
• YTD: 2.94%
• 6M: 5.53%
• 1Y: 11.05%
• 3Y*: 28.54%
• 5Y*: 17.93%
• 10Y*: 25.58%

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

FSLY vs. HEI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FSLY Fastly, Inc.	95.58%	7.84%	-46.97%	117.34%	-76.90%	-59.43%	335.33%	-16.34%
HEI HEICO Corporation	2.94%	36.22%	33.05%	16.56%	6.67%	9.06%	16.16%	10.73%

Correlation

The correlation between FSLY and HEI is 0.23, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.23
Correlation (3Y) Calculated over the trailing 3-year period	0.20
Correlation (5Y) Calculated over the trailing 5-year period	0.26
Correlation (All Time) Calculated using the full available price history since May 20, 2019	0.21

Fundamentals

Market Cap FSLY : $3.06B HEI : $46.97B
EPS FSLY : -$0.69 HEI : $5.60
PS Ratio FSLY : 4.56 HEI : 9.56
PB Ratio FSLY : 3.13 HEI : 8.71
Total Revenue (TTM) FSLY : $652.57M HEI : $4.91B
Gross Profit (TTM) FSLY : $382.79M HEI : $943.00M
EBITDA (TTM) FSLY : -$22.82M HEI : $1.12B

Return for Risk

FSLY vs. HEI — Risk / Return Rank

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

FSLY

FSLY Risk / Return Rank: 83
FSLY Sharpe Ratio Rank: 79
FSLY Sortino Ratio Rank: 84
FSLY Omega Ratio Rank: 85
FSLY Calmar Ratio Rank: 83
FSLY Martin Ratio Rank: 84

HEI

HEI Risk / Return Rank: 51
HEI Sharpe Ratio Rank: 54
HEI Sortino Ratio Rank: 48
HEI Omega Ratio Rank: 48
HEI Calmar Ratio Rank: 52
HEI Martin Ratio Rank: 53

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.

FSLY vs. HEI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fastly, Inc. (FSLY) and HEICO Corporation (HEI). 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.

	FSLY	HEI	Difference
Sharpe ratio: Return per unit of total volatility	1.36	0.34	+1.02
Sortino ratio: Return per unit of downside risk	2.58	0.73	+1.85
Omega ratio: Gain probability vs. loss probability	1.36	1.09	+0.27
Calmar ratio: Return relative to maximum drawdown	3.12	0.41	+2.71
Martin ratio: Return relative to average drawdown	8.30	1.00	+7.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FSLY vs. HEI - Sharpe Ratio Comparison

The current FSLY Sharpe Ratio is 1.36, which is higher than the HEI Sharpe Ratio of 0.34. The chart below compares the historical Sharpe Ratios of FSLY and HEI, 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

	FSLY	HEI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.36	0.34	+1.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.18	0.65	-0.84
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.84	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.03	0.52	-0.54

Drawdowns

FSLY vs. HEI - Drawdown Comparison

The maximum FSLY drawdown since its inception was -96.12%, which is greater than HEI's maximum drawdown of -75.50%. Use the drawdown chart below to compare losses from any high point for FSLY and HEI.

Drawdown Indicators

	FSLY	HEI	Difference
Max Drawdown Largest peak-to-trough decline	-96.12%	-75.50%	-20.62%
Max Drawdown (1Y) Largest decline over 1 year	-51.28%	-27.11%	-24.17%
Max Drawdown (3Y) Largest decline over 3 years	-79.99%	-27.11%	-52.88%
Max Drawdown (5Y) Largest decline over 5 years	-91.81%	-27.11%	-64.70%
Max Drawdown (10Y) Largest decline over 10 years	—	-57.73%	—
Current Drawdown Current decline from peak	-84.55%	-7.00%	-77.55%
Average Drawdown Average peak-to-trough decline	-70.16%	-19.96%	-50.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	19.26%	11.11%	+8.15%

Volatility

FSLY vs. HEI - Volatility Comparison

Fastly, Inc. (FSLY) has a higher volatility of 52.32% compared to HEICO Corporation (HEI) at 14.84%. This indicates that FSLY's price experiences larger fluctuations and is considered to be riskier than HEI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSLY	HEI	Difference
Volatility (1M) Calculated over the trailing 1-month period	52.32%	14.84%	+37.48%
Volatility (6M) Calculated over the trailing 6-month period	97.59%	27.16%	+70.43%
Volatility (1Y) Calculated over the trailing 1-year period	117.41%	32.64%	+84.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	87.36%	27.57%	+59.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	89.30%	30.60%	+58.70%

Dividends

FSLY vs. HEI - Dividend Comparison

FSLY has not paid dividends to shareholders, while HEI's dividend yield for the trailing twelve months is around 0.07%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSLY Fastly, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
HEI HEICO Corporation	0.07%	0.07%	0.09%	0.11%	0.12%	0.12%	0.12%	0.12%	0.14%	0.08%	0.22%	0.28%

Financials

FSLY vs. HEI - Profitability Comparison

The chart below illustrates the profitability comparison between Fastly, Inc. and HEICO Corporation over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

FSLY - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Fastly, Inc. reported a gross profit of 108.18M and revenue of 173.02M. Therefore, the gross margin over that period was 62.5%.

HEI - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, HEICO Corporation reported a gross profit of -454.96M and revenue of 1.38B. Therefore, the gross margin over that period was -33.1%.

FSLY - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Fastly, Inc. reported an operating income of -23.90M and revenue of 173.02M, resulting in an operating margin of -13.8%.

HEI - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, HEICO Corporation reported an operating income of 350.44M and revenue of 1.38B, resulting in an operating margin of 25.5%.

FSLY - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Fastly, Inc. reported a net income of -20.52M and revenue of 173.02M, resulting in a net margin of -11.9%.

HEI - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, HEICO Corporation reported a net income of 233.80M and revenue of 1.38B, resulting in a net margin of 17.0%.

Frequently Asked Questions

Can I hold both FSLY and HEI in my portfolio?

FSLY and HEI have a correlation of 0.23, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSLY or HEI?

FSLY has higher volatility (52.32%) compared to HEI (14.84%). In terms of maximum drawdown, FSLY dropped -96.12% vs HEI's -75.50%.

Which has better risk-adjusted returns?

FSLY currently has the higher Sharpe Ratio (1.36 vs 0.34), 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.