AAOI
Applied Optoelectronics, Inc.
AAOI has the edge over DAIO overall, supported by stronger fundamentals and stronger modeled upside.
DAIO
Data I/O Corporation
DAIO has lower modeled downside risk, despite its lower overall score.
AAOI Fundamentals
| Metric | Status |
|---|---|
| Strong | |
| Under pressure | |
| Weak | |
| Unavailable |
AAOI's revenue is currently strong, but its profitability and cash flow are under pressure. There isn't enough data to rate its balance sheet.
DAIO Fundamentals
| Metric | Status |
|---|---|
| Weak | |
| Weak | |
| Weak | |
| Strong |
DAIO's balance sheet is currently strong, but its revenue, profitability and cash flow are weak.
AAOI PE Valuation
AAOI has no meaningful PE right now: it lost money over the past year. If it returns to profit as analysts expect, today's price would be 18x next year's earnings.
DAIO PE Valuation
DAIO has no meaningful PE right now: it lost money over the past year. If it returns to profit as analysts expect, today's price would be 33x next year's earnings.
AAOI Forward outlook
| Metric | Outlook |
|---|---|
| -- | |
| Returning to profit | |
| Strong growth | |
| Strongly improving | |
| Limited | |
| Low |
Analysts expect AAOI to return to profit, with revenue growing. However, they disagree widely on these estimates.
DAIO Forward outlook
| Metric | Outlook |
|---|---|
| -- | |
| Returning to profit | |
| Strong growth | |
| Strongly improving | |
| Limited | |
| High |
Analysts expect DAIO to return to profit, with revenue growing.
AAOI Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $2.98 | — |
| Q3 2026 | -$0.42 | +$3.02 |
| Q2 2026 | -$0.77 | +$2.81 |
| Q1 2026 | -$0.65 | +$3.43 |
| Q4 2025 | -$0.64 | +$3.86 |
| Q3 2025 | -$3.44 | -$1.41 |
| Q2 2025 | -$3.58 | -$1.70 |
| Q1 2025 | -$4.08 | -$2.29 |
| Q4 2024 | -$4.50 | -$2.75 |
AAOI has the edge over DAIO on earnings, with more consistent year-over-year improvement.
DAIO Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $0.08 | — |
| Q2 2026 | -$0.95 | -$0.67 |
| Q1 2026 | -$0.86 | -$0.57 |
| Q4 2025 | -$0.56 | -$0.22 |
| Q3 2025 | -$0.40 | -$0.21 |
| Q2 2025 | -$0.28 | -$0.11 |
| Q1 2025 | -$0.29 | -$0.24 |
| Q4 2024 | -$0.34 | -780% |
| Q3 2024 | -$0.19 | -311% |
DAIO lost $0.95 per share over the past year, and its loss has widened in each of the last four quarters.
AAOI Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $269.9M | +127% |
| Q2 2026 | $191.9M | +86% |
| Q1 2026 | $151.1M | +51% |
| Q4 2025 | $134.3M | +34% |
| Q3 2025 | $118.6M | +82% |
| Q2 2025 | $103M | +138% |
| Q1 2025 | $99.9M | +146% |
| Q4 2024 | $100.3M | +66% |
AAOI has the edge over DAIO on sales, with more consistent year-over-year improvement.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | -0.5% | +15 points |
| Q2 2026 | -13% | +2.6 points |
| Q1 2026 | -8.6% | +0.3 points |
| Q4 2025 | -8.6% | -2.1 points |
| Q3 2025 | -15% | +10 points |
| Q2 2025 | -16% | +45 points |
| Q1 2025 | -8.9% | +44 points |
| Q4 2024 | -6.5% | +1 points |
AAOI has the edge over DAIO on profitability, with a higher operating margin.
DAIO Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q2 2026 | $5.1M | -13% |
| Q1 2026 | $3.3M | -47% |
| Q4 2025 | $4M | -23% |
| Q3 2025 | $5.4M | -0.6% |
| Q2 2025 | $5.9M | +18% |
| Q1 2025 | $6.2M | +1.3% |
| Q4 2024 | $5.2M | -25% |
| Q3 2024 | $5.4M | -17% |
DAIO's revenue has slid since its 2023 peak: $5M last quarter, down 13% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q2 2026 | -14% | +0.1 points |
| Q1 2026 | -97% | -91 points |
| Q4 2025 | -63% | -38 points |
| Q3 2025 | -26% | -20 points |
| Q2 2025 | -14% | -3 points |
| Q1 2025 | -6.1% | +8 points |
| Q4 2024 | -25% | -27 points |
| Q3 2024 | -6% | -5 points |
DAIO's operating margin was −14% last quarter, about level with the same quarter a year ago.
AAOI Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | -$369.9M | -$291.2M |
| Q2 2026 | -$265.3M | -$174.4M |
| Q1 2026 | -$143.6M | -$64.3M |
| Q4 2025 | -$104.6M | -$51.6M |
| Q3 2025 | -$78.7M | -$58M |
| Q2 2025 | -$91M | -$86M |
| Q1 2025 | -$79.3M | -$45.1M |
| Q4 2024 | -$53M | -$48.4M |
AAOI has burned cash in almost every quarter: −$883M over the past year, against −$302M the year before.
DAIO Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q2 2026 | -$3.2M | -$2.5M |
| Q1 2026 | -$2.2M | -4317% |
| Q4 2025 | -$1.9M | -$119K |
| Q3 2025 | -$348K | -148% |
| Q2 2025 | -$633K | -$365K |
| Q1 2025 | $53K | +$233K |
| Q4 2024 | -$1.7M | -763% |
| Q3 2024 | $724K | +997% |
DAIO has the edge over AAOI on cash flow, with more consistent year-over-year improvement.
AAOI Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +7.7% | +6.3M shares |
| 1 year | +39% | +24.5M shares |
| 3 years | +168% | +55.1M shares |
| 5 years | +224% | +60.7M shares |
| Available history | +340% | +67.9M shares |
AAOI has 88M diluted shares, up 39% from a year ago.
DAIO Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +1.9% | +179K shares |
| 1 year | +4.6% | +422K shares |
| 3 years | +9.9% | +863K shares |
DAIO has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q4 2020 | — |
| Q3 2020 | — |
| Q2 2020 | — |
| Q1 2020 | — |
| Q4 2019 | $1,000 |
| Q3 2019 | $245,000 |
AAOI Net Leverage
AAOI's operating earnings (EBITDA) were negative over the past year, so its debt can't be measured against them.
DAIO Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q1 2024 | -169.0x | Net Cash |
| Q4 2023 | -6.3x | Net Cash |
| Q3 2023 | -8.0x | Net Cash |
| Q2 2023 | -5.3x | Net Cash |
| Q1 2023 | -8.7x | Net Cash |
| Q4 2021 | -36.0x | Net Cash |
| Q3 2019 | -21.7x | Net Cash |
DAIO has more cash than debt.
AAOI Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 35.1 | Neutral |
| Stochastic | 4.8 | Oversold |
AAOI's weekly RSI is 35 (neutral) and its Stochastic is 5 (oversold).
DAIO Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 44.4 | Neutral |
| Stochastic | 14.5 | Oversold |
DAIO's weekly RSI is 44 (neutral) and its Stochastic is 14 (oversold).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
DAIO PE vs Technology Sector
| Metric | DAIO | Sector median | Relative |
|---|---|---|---|
| PE | N/A | 28x | — |
DAIO has no meaningful PE right now: it lost money over the past year.
AAOI Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $80.2 | 34% below |
| 20 week MA | $100.6 | 47% below |
| 50 week MA | $100.3 | 47% below |
| 100 week MA | $62.3 | 15% below |
| 200 week MA | $36.9 | 43% above |
AAOI has fallen below most of its moving averages, though it's still 43% above its 200-week average.
DAIO Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $2.64 | 0% above |
| 20 week MA | $2.91 | 9.3% below |
| 50 week MA | $3.00 | 12% below |
| 100 week MA | $2.93 | 9.9% below |
| 200 week MA | $3.20 | 18% below |
DAIO is in a downtrend: it's below all five of its weekly moving averages, and 18% below its 200-week average.
AAOI Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $11.5 | $8.77 | -24% |
| 2021 | $8.77 | $5.64 | -36% |
| 2022 | $5.64 | $1.95 | -65% |
| 2023 | $1.95 | $19.3 | +891% |
| 2024 | $19.3 | $37.7 | +95% |
| 2025 | $37.7 | $37.2 | -1.5% |
| 2026 YTD | $37.2 | $52.9 | +42% |
AAOI has the edge over DAIO on returns for 2026, with the stronger performance.
DAIO Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $4.01 | $4.48 | +12% |
| 2021 | $4.48 | $4.49 | +0.2% |
| 2022 | $4.49 | $3.79 | -16% |
| 2023 | $3.79 | $2.94 | -22% |
| 2024 | $2.94 | $2.76 | -6.1% |
| 2025 | $2.76 | $3.22 | +17% |
| 2026 YTD | $3.22 | $2.64 | -18% |
DAIO has finished lower in three of the last six years. It's down 18% so far in 2026.