Applied Optoelectronics, Inc. (AAOI) P/E Ratio History
Deep ValueTrading at -252.9x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2014–2018
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P/E Ratio Analysis
As of June 22, 2026, Applied Optoelectronics, Inc. (AAOI) trades at a price-to-earnings ratio of -252.9x, with a stock price of $161.85 and trailing twelve-month earnings per share of $-0.57.
The current P/E is 747% below its 5-year average of 39.1x. Over the past five years, AAOI's P/E has ranged from a low of 9.0x to a high of 178.5x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Technology sector median P/E of 29.0x, AAOI trades at a 972% discount to its sector peers. The sector includes 352 companies with P/E ratios ranging from 0.0x to 187.7x.
Relative to the broader market, AAOI trades at a notable discount to the S&P 500 median P/E of 24.4x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our AAOI DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
AAOI Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
AAOI P/E vs Peers
Optical, Photonics and Display Components peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $61B | 2297.3 | - | +105% | |
| $11B | 314.5 | 68.90 | +225% | |
| $61B | 503.8 | - | +47% | |
| $2B | 146.0 | - | +158% | |
| $471B | 46.9Lowest | - | +0% | |
| $214B | 61.7 | 1.52Best | +23% | |
| $2.0T | 86.2 | 1.73 | +288%Best |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
AAOI Historical P/E Data (2014–2018)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2018 Q3 | Sep 30 2018 | $24.66 | $0.60 | 41.1x | +5% |
| FY2018 Q2 | Jun 30 2018 | $44.90 | $1.74 | 25.8x | -34% |
| FY2018 Q1 | Mar 31 2018 | $25.06 | $2.77 | 9.0x | -77% |
| FY2017 Q4 | Dec 31 2017 | $37.82 | $3.66 | 10.3x | -74% |
| FY2017 Q3 | Sep 30 2017 | $64.67 | $4.15 | 15.6x | -60% |
| FY2017 Q2 | Jun 30 2017 | $61.79 | $4.17 | 14.8x | -62% |
| FY2017 Q1 | Mar 31 2017 | $56.15 | $2.77 | 20.3x | -48% |
| FY2016 Q4 | Dec 31 2016 | $23.44 | $1.69 | 13.9x | -64% |
| FY2016 Q3 | Sep 30 2016 | $22.21 | $1.07 | 20.8x | -47% |
| FY2016 Q2 | - | $11.15 | $0.26 | 42.9x | +10% |
| FY2016 Q1 | - | $14.91 | $0.61 | 24.4x | -37% |
| FY2015 Q4 | - | $17.16 | $0.64 | 26.8x | -31% |
| FY2015 Q3 | Sep 30 2015 | $18.78 | $0.54 | 34.8x | -11% |
| FY2015 Q2 | - | $17.36 | $0.48 | 36.2x | -7% |
| FY2015 Q1 | - | $13.88 | $0.22 | 63.1x | +62% |
| FY2014 Q4 | Dec 31 2014 | $11.22 | $0.28 | 40.1x | +3% |
| FY2014 Q3 | - | $16.10 | $0.19 | 84.7x | +117% |
| FY2014 Q2 | Jun 30 2014 | $23.20 | $0.13 | 178.5x | +357% |
Average P/E for displayed period: 39.1x
Full Stock Analysis
Deep dive into AAOI consensus models and risk factors.
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
12+ years return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
AAOI — Frequently Asked Questions
Quick answers to the most common questions about buying AAOI stock.
What is AAOI's P/E ratio?
Applied Optoelectronics, Inc. (AAOI) trailing twelve-month P/E ratio is -252.9x, based on TTM diluted EPS of $-0.57. The 5-year average P/E is 39.1x and the historical range spans 9.0x to 178.5x.
Is AAOI stock overvalued or undervalued?
AAOI trades at -252.9x P/E, below its 5-year average of 39.1x. At the 0th percentile of its historical range (9.0x–178.5x), the stock is priced at a discount to its own history.
Is AAOI stock expensive?
No, AAOI is not expensive on a historical basis. The current P/E of -252.9x is below the 5-year average of 39.1x and sits at the 0th percentile of its valuation range.
What is AAOI's historical P/E range?
Over the past 5 years, AAOI's P/E ratio has ranged from 9.0x to 178.5x, with a median of 26.8x and an average of 39.1x. The current P/E of -252.9x places the stock at the 0th percentile of this range. Full historical data spans 2014–2018.
How does AAOI's P/E compare to the S&P 500?
AAOI trades at -252.9x P/E versus the S&P 500 median of 24.4x. The 1136% discount to the market suggests lower growth expectations or perceived higher risk.
How does AAOI's valuation compare to Technology peers?
Applied Optoelectronics, Inc. P/E of -252.9x compares to the Technology sector median of 29.0x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is AAOI's PEG ratio?
AAOI PEG ratio is N/A, based on a P/E of -252.9x and EPS growth of 85.8%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is AAOI's earnings yield?
AAOI earnings yield is N/A, the inverse of its -252.9x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.