Question 1

What is Applied Optoelectronics's P/E ratio?

Accepted Answer

Applied Optoelectronics (AAOI) P/E ratio is currently not available. When trailing twelve-month earnings are negative (a net loss), the P/E ratio is mathematically meaningless and is reported as not available (N/A). In that case investors typically use P/S, EV/Sales, or forward P/E instead.

Question 2

How is the P/E ratio calculated?

Accepted Answer

P/E = Share Price ÷ Trailing Twelve-Month (TTM) Diluted EPS, or equivalently Market Capitalisation ÷ TTM Net Income. All inputs are sourced from audited GAAP/IFRS filings and translated to USD using period-end exchange rates so the multiple is comparable across companies and currencies.

Question 3

What is the P/E ratio?

Accepted Answer

The price-to-earnings (P/E) ratio, also called the earnings multiple, measures how much investors pay per dollar of a company's trailing twelve-month (TTM) earnings. It is calculated as share price ÷ TTM diluted EPS (equivalent to market capitalisation ÷ TTM net income). A higher P/E implies the market is pricing in stronger future earnings growth or lower risk; a lower P/E can signal slower expected growth, higher risk, or potential undervaluation.

Question 4

What is a good P/E ratio for Applied Optoelectronics?

Accepted Answer

There is no universal "good" P/E. As a rule of thumb, the S&P 500 has historically averaged a P/E in the mid-to-high teens; mature, slow-growth businesses commonly trade in the 10–18× range, while high-growth or asset-light companies often trade at 25–50×+. What matters is the comparison to sector peers and to the company's own historical range. For Applied Optoelectronics specifically, the relevant sector benchmark is the current sector median of 29.6×.

Question 5

What is Applied Optoelectronics's historical P/E ratio range?

Accepted Answer

In the available daily series, Applied Optoelectronics (AAOI) P/E ratio has ranged from a low of 8.7× in 2018 to a high of 183.0× in 2014.

Question 6

What was Applied Optoelectronics's P/E ratio in 2017?

Accepted Answer

Applied Optoelectronics (AAOI) P/E ratio at the end of 2017 was 9.9×. Annual values reflect the multiple on the last trading day of each calendar year, using the trailing twelve-month earnings figure available at that date.

Question 7

Why does Applied Optoelectronics's P/E ratio change over time?

Accepted Answer

Valuation multiples move with two inputs: the numerator (market capitalisation, which tracks the share price) and the denominator (earnings). Share-price changes — driven by interest rates, earnings expectations, risk appetite, and broader market sentiment — typically dominate short-term moves, while changes in the underlying fundamental drive the longer-term trend. As a result, the ratio can rise during stock-price rallies even if the business itself has not become more valuable, and fall during sell-offs even when fundamentals are improving.

Question 8

Why is Applied Optoelectronics's P/E ratio not available?

Accepted Answer

When trailing twelve-month earnings are negative (a net loss), the P/E ratio is mathematically meaningless and is reported as not available (N/A). In that case investors typically use P/S, EV/Sales, or forward P/E instead.


2025	$2.45B	−$38.23M	—	—	Dec 31, 2025
2024	$1.70B	−$186.73M	—	—	Dec 31, 2024
2023	$706.13M	−$56.05M	—	—	Dec 31, 2023
2022	$53.79M	−$66.39M	—	—	Dec 31, 2022
2021	$139.67M	−$54.16M	—	—	Dec 31, 2021
2020	$224.99M	−$58.45M	—	—	Dec 31, 2020
2019	$238.86M	−$66.05M	—	—	Dec 31, 2019
2018	$305.21M	−$2.15M	—	—	Dec 31, 2018
2017	$733.93M	$73.95M	9.9×	-3.3×	Dec 31, 2017
2016	$413.27M	$31.23M	13.2×	-13.5×	Dec 31, 2016
2015	$288.85M	$10.79M	26.8×	-12.1×	Dec 31, 2015
2014	$166.27M	$4.28M	38.8×	—	Dec 31, 2014
2013	$189.59M	−$1.41M	—	—	Dec 31, 2013


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P/E Ratio for Applied Optoelectronics (AAOI)

P/E Ratio daily chart for Applied Optoelectronics (AAOI)

Historical P/E Ratio for Applied Optoelectronics (AAOI) from 2013 to 2025

About P/E Ratio at Applied Optoelectronics (AAOI)

Applied Optoelectronics P/E Ratio by Year

Applied Optoelectronics P/E Ratio 2017: 9.9×

Applied Optoelectronics P/E Ratio 2016: 13.2×

Applied Optoelectronics P/E Ratio 2015: 26.8×

Applied Optoelectronics P/E Ratio 2014: 38.8×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

Applied Optoelectronics (AAOI) Key Financials

P/E Ratio daily chart for Applied Optoelectronics (AAOI)

Historical P/E Ratio for Applied Optoelectronics (AAOI) from 2013 to 2025

About P/E Ratio at Applied Optoelectronics (AAOI)

Applied Optoelectronics P/E Ratio by Year

Applied Optoelectronics P/E Ratio 2017: 9.9×

Applied Optoelectronics P/E Ratio 2016: 13.2×

Applied Optoelectronics P/E Ratio 2015: 26.8×

Applied Optoelectronics P/E Ratio 2014: 38.8×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

+What is Applied Optoelectronics's P/E ratio?

+How is the P/E ratio calculated?

+What is the P/E ratio?

+What is a good P/E ratio for Applied Optoelectronics?

+What is Applied Optoelectronics's historical P/E ratio range?

+What was Applied Optoelectronics's P/E ratio in 2017?

+Why does Applied Optoelectronics's P/E ratio change over time?

+Why is Applied Optoelectronics's P/E ratio not available?

Applied Optoelectronics (AAOI) Key Financials