Is Diodes Inc /Del/ (DIOD) a good stock to buy?
Two or more of our tested checks point the wrong way. When the survival check is one of them, no price makes that acceptable.
What each rating means, in numbers
Can it survive? — Very safe. Safer than 91% of the companies we cover, judged on the warning signs that came before companies that really did fail.
Cash it pays you — Low. For every $100 of share price, the business threw off about $2.4 of spare cash last year. Higher is better: the cheap fifth on this measure ran about 7.7 points a year ahead of the dear fifth, 2011 to 2025.
Business quality — Strong. Passes 7 of the 9 health checks we can measure — things like making a profit, turning it into cash, and not piling on debt. Across 131,000 company-quarters the weakest scorers went on to fail at 5.4% against 1.4% for the strongest, in every era and all twelve sectors.
How wild is the price? — Wild. The share price swings about 54% in a typical year, which puts it in the above average. Out of every 100 companies that swung like this, about 3.7 went bankrupt within the year. Across the three periods we tested that ran from 0.9% to 5.7%.
What "tested" means here, and why there is no score out of 100
Tested means the read was measured against what actually happened afterwards, on a history that keeps the companies that were later delisted, using only figures that had been filed on the day they are used. Survival was ranked on companies that really did fail. What an owner keeps was tested across the universe from 2011 to 2025.
The full record of everything we have tested is on the research pages.
Which benchmark. Over the period we tested, the median listed company returned +5.8% a year while the S&P 500 returned about +13.9% — the index is weighted by size and was carried by a handful of enormous winners. So "beats the index" and "beats the other companies you could have bought" are different questions. Where a read says it picks better companies, it means the second one. None of these gets you an index fund's return, and we would rather say that than imply otherwise.
The quality read is the strongest thing we have tested: 131,000 company-quarters across 5,300 companies, where the weakest scorers went on to fail at 5.4% against 1.4% for the strongest, holding in every era and all twelve sectors. It still says less likely to break, not likely to beat the market — every band in that study lost to the index at the median, because the median listed company does.
Each read is shown on its own rather than merged into a single score, so you can see which part is strong and which is weak instead of taking an average on trust.
▾ What goes into the smart-money reading
Contributions (weight × component score) sum to the total. This near-term score now includes fundamental health (leverage, FCF trend). It excludes the Altman Z score, whose retained-earnings input this filer does not report separately. See the Financial Health section for the full balance-sheet read.
Chance the S&P 500 falls 10% or more in the next three months.
Counted from every day since 2006. Says nothing about DIOD — see the board for how it is measured.
📍 Where to start on this page, and what to look at first
How to read DIOD
We are not publishing an intrinsic value for this one — the section below says exactly why. Everything on this page that comes straight from the filings and the tape is still here; treat the missing valuation as a known gap, not as a verdict on the business.
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1
Reported earnings & margins ↓
What the company actually reported — unaffected by the valuation being held.
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2
Balance sheet & book value ↓
Assets, liabilities and equity as filed.
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3
Who's selling & betting against it ↓
Insider and short-interest behaviour needs no valuation model.
The share count we read for DIOD looks wrong — common for multi-class / founder-controlled filers that report shares per share-class. That makes per-share figures (including intrinsic value) misleading, so we suppressed them. The company's total financials below are sound.
What to use instead: Lean on the totals — revenue, net income, cash flow — and the balance sheet. Multi-class share counts are being corrected; once fixed, the per-share valuation returns automatically.
This note is only about the single DCF fair-value number — DIOD's full financial statements, health scores, and written analysis are all below.
Who owns DIOD, and how it moves
From the SEC's own filings: every fund manager over $100M reports its holdings each quarter, and every officer and director reports theirs. Each point is what was public at the time.
397 institutions reported holding it at the latest quarter-end.
Safer than 91% of the stocks we cover
What this rating means, and what it does not
What this rank is — Very safe. Safer than 91% of the companies we cover. Out of every 100 companies ranked here, about <0.1% went bankrupt within the year, against 0.6% for the average company we cover. The rank comes from a model trained on every US filing since 2012, including 823 companies that really did fail, and scored each year by a version that had not seen that year.
What it is not — Not a trade. We tested shorting these names and buying puts, spreads, straddles and condors on them at real option prices, 2010-2025. Every version lost money: the market already prices the distress and the survivors squeeze. A high rank is a reason to read the filings and to size for a total loss, not a reason to bet against the company. A low rank says the balance sheet is calm, not that the price is sensible.
▾ The numbers, the logic, and why not to trade on it
The logic. A model trained on every US filing since 2012 — including 823 companies that went bankrupt or stopped trading under a dollar — ranks each covered stock by its chance of failing in the next year, from its latest filing, price history and credit conditions. The rank is a position among peers; the table is a count of what happened to stocks in each position, scored each year by a model that had not seen that year.
| Rank band | went bankrupt within 12 months | fell 80% or more (or failed) within 12 months | fell 50% or more (or failed) within 6 months |
|---|---|---|---|
| All covered stocks (average) | 0.59% | 4.21% | 8.51% |
| Technology & business equipment (sector average) | 0.43% | 3.59% | 8.34% |
| riskiest 1% | 16.4% | 33.0% | 45.5% |
| next 2% (97-99) | 5.9% | 24.9% | 38.2% |
| next 2% (95-97) | 3.4% | 21.2% | 33.8% |
| next 5% (90-95) | 1.6% | 15.1% | 27.3% |
| next 15% (75-90) | 0.8% | 8.5% | 17.8% |
| next 25% (50-75) | 0.2% | 2.7% | 6.2% |
| safest half ← this stock | <0.1% | 0.5% | 2.1% |
Why not to trade on it. We tested shorting these names and buying puts, spreads, straddles and condors on them at real option prices, 2010–2025: every version lost money. The market already prices the distress, and the survivors squeeze. Use a high rank to read the filings and to size for a total loss — not to bet against the company. A low rank says the balance sheet is calm, not that the price is sensible.
Scored from the filing of 2026-05-08; table generated 2026-09-18. Within Technology & business equipment: rank 9 of 100. Rough one-year odds for this stock alone: bankruptcy 0.1%, an 80% fall 1.0% (the model overstates the middle of the range).
▾ The logic, and why not to buy on it
The logic. Trained on 2,900 acquisitions since 2012, the model leans on size (small), age, retained earnings, asset growth, volatility and how many deals the sector has just seen. Announcement = the day the stock jumped, not the day the paperwork was filed.
| top 1% | 15.4% acquired within a year |
| next 2% (97-99) | 10.3% acquired within a year |
| next 2% (95-97) | 9.0% acquired within a year |
| next 5% (90-95) | 7.3% acquired within a year |
| next 15% (75-90) | 6.4% acquired within a year |
| next 25% (50-75) | 4.8% acquired within a year |
| bottom half ← this stock | 3.0% acquired within a year |
Why not to buy on it. A takeover paid a median +22% on the day — but even in the top band about 6 in 7 companies are not bought, and those lag. Buying the whole top list returned what the S&P 500 did (2012–2023), and adding "cheap" or "beaten-down" filters did not change that. Read it as context for a thesis you already have, never as the thesis.
What this rating means
What the rating says — Below every method. Every model's range sits above the current price, but that does not prove mispricing. The gap may reflect secular or cyclical pressures, leverage, or information not yet captured by the model. Review recent filings and test lower normalized cash-flow assumptions before relying on the valuation.
What it does not say — Not a forecast. This shows where today's price sits against several different ways of valuing the business. Where the methods disagree, the spread itself is the useful part - it tells you how much the answer depends on which one you trust.
Football field: where does the price sit?
Different valuation methods produce different fair-value ranges depending on assumptions. Plotting them together lets you see at a glance whether the current price is reasonable across approaches, or only one specific lens.
Industry multiples sourced from: industry: Semiconductors. See the Peer Basket section below for the peer comparison and its limited-comparables caveat.
How does DIOD stack up against its closest peers?
We take the 6 same-industry companies most similar to DIOD (similar size) and check what investors are paying for each dollar of their revenue (or profits). If DIOD is much more expensive on the same yardstick, that's a red flag — unless you have a specific reason it deserves a premium. For a leveraged business, EV/EBIT and FCF yield (both in the table) are usually more reliable than EV/Sales, because revenue multiples ignore differences in margins and debt.
▾ What's "EV / Sales" in plain English?
EV (Enterprise Value) = market cap + total debt − cash. It's "what you'd pay to buy the entire company outright" — you pay the market cap to shareholders and take over their debt, but you keep their cash. EV is fairer than market cap alone because it includes the debt the new owner inherits.
EV / Sales = EV ÷ annual revenue. So "2.5×" means investors pay $2.50 of enterprise value per $1 of yearly sales. Higher = market is paying more per dollar of sales (usually because they expect future growth or fat margins).
p25 / median / p75 are the 25th, 50th (middle), and 75th percentile of the peers' multiples. Half the peers fall between p25 and p75. The median (p50) is the typical peer — that's the benchmark we compare to.
| EV / SalesEV / Sales — For every $1 of yearly revenue, this is how many dollars investors pay to own the whole business (including debt). Why it matters: Works for pre-profit growth companies where P/E and FCF don't apply. The most apples-to-apples cross-company multiple because it ignores accounting choices. Reference: 1–3x for mature companies · 4–10x for software/SaaS · 10–20x for hypergrowth · >20x is rare and demanding Full explanation → |
3.9x / 5.3x / 8.2x |
| EV / Gross ProfitEV / Gross Profit — Enterprise value divided by gross profit — the multiple paid for what each dollar of sales contributes after direct costs. Why it matters: More refined than EV/Sales for high-margin businesses (software, marketplaces) where gross margin is the real economic engine. Reference: 8–15x for SaaS · 15–25x for hypergrowth software · >30x demanding Full explanation → |
12.7x / 16.0x / 23.7x |
Bold middle number = median peer. Half the peers trade above it, half below. Computed over 6 same-industry peers; implausible multiples excluded.
⚠️ Important caveat: peer multiples only work if the peers are genuinely comparable. Always check the peer list below — if the auto-picker grabbed micro-caps or unrelated businesses, the comparison is noise. A medical-device giant priced against tiny biotech startups won't produce a useful signal.
▾ View peer list (8)
| Ticker | Company | Industry | Mcap | EV/Sales | EV/GP | EV/EBIT | FCF Yield |
|---|---|---|---|---|---|---|---|
| SEDG | SOLAREDGE TECHNOLOGIES, INC. | Semiconductors | $4.6B | 3.9x | 23.7x | — | 2.4% |
| IPGP | IPG PHOTONICS CORP | Semiconductors | $4.9B | 4.8x | 12.7x | 370.9x | 2.2% |
| SYNA | SYNAPTICS Inc | Semiconductors | $5.3B | 5.7x | 12.8x | — | 1.8% |
| KLIC | KULICKE & SOFFA INDUSTRIES INC | Semiconductors | $5.3B | 8.2x | 19.2x | — | 1.0% |
| PI | IMPINJ INC | Semiconductors | $5.4B | 15.8x | 30.0x | — | 1.3% |
| OSIS | OSI SYSTEMS INC | Semiconductors | $3.2B | 2.4x | 7.1x | 19.4x | 6.2% |
| OLED | UNIVERSAL DISPLAY CORP \PA\ | Semiconductors ·fallback | $4.3B | 6.6x | 8.7x | 17.3x | 2.9% |
| UCTT | Ultra Clean Holdings, Inc. | Semiconductors ·fallback | $3.8B | 2.1x | 13.4x | — | 4.5% |
Quality & solvency checks
Cheap stocks can be cheap for a reason. These screens warn when a low valuation comes paired with structural fragility.
What these health ratings mean, in numbers
Business quality — Strong. Passes 7 of the 9 health checks we can measure — making a profit, turning it into cash, not piling on debt, not issuing shares. Across 131,000 company-quarters the weakest scorers went on to fail at 5.4% within a year against 1.4% for the strongest, and that held in every era and all twelve sectors. It says "less likely to break", not "likely to beat the market".
Why it matters: Cheap-looking stocks (low P/E or P/B) often have low Z-scores because the market knows the company is dying. Z-score warns you before you fall into a value trap.
Reference: > 3.0 = safe zone · 1.81–3.0 = grey zone · < 1.81 = distress zone
Full explanation →
We can't produce a trustworthy Altman Z here: retained earnings weren't separately reported in our data, so a core input would have to be fabricated. Rather than show a categorical "distress" verdict from an invented number, we mark it unavailable. Judge financial health from the leverage, cash position, and the measurable Piotroski checks instead.
Why it matters: High score = fundamentals improving. Low score = deteriorating. Especially powerful for filtering cheap stocks: cheap + high F-score historically outperforms; cheap + low F-score is often a value trap.
Reference: 7–9 = strong · 4–6 = mediocre · 0–3 = weak
Full explanation →
▾ The checks — what passed, what didn't (and what we couldn't measure)
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✓ Positive net incomeNet income $66.1M in FY2025.
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✓ Positive operating cash flowOperating cash flow $215.5M (was $119.4M the prior year).
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✓ Cash flow backs up reported profitOperating cash flow $215.5M vs net income $66.1M.
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✓ Return on assets improvingReturn on assets 2.7% vs 1.8% a year ago.
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✗ Debt load (vs assets)Long-term debt is 1.0% of assets vs 0.9% a year ago ($25.7M of $2,448.1M assets).Why this matters: Rising debt relative to assets means more risk and more cash going to interest instead of shareholders. Falling debt is a sign of strengthening.
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✓ Short-term liquidity (current ratio)Current ratio 3.32x vs 3.26x a year ago.
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✓ Share count (dilution)Share count held roughly flat (46.4M → 46.4M year-over-year).
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✗ Pricing power (gross margin)Gross margin 31.2% vs 33.2% a year ago.Why this matters: Rising gross margin means stronger pricing power or lower input costs — a sign of competitive strength. Falling margin signals pressure.
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✓ Sales per asset (asset turnover)Asset turnover 0.61x vs 0.55x a year ago.
Missing data is never counted as a pass or a fail — it's shown as n/a and excluded from the denominator. Each check compares the company against its own prior year.
What if you assume different inputs?
Here's where we land — and what happens if you change the assumptions. Drag the sliders to set your own Discount RateDiscount Rate — The annual return you demand for taking single-stock risk instead of buying a safe Treasury or index fund.
Why it matters: Higher discount rate = stricter valuation (a stock has to produce more cash to be worth holding). Lower = more generous.
Reference: 8–12% is standard · 9–10% matches S&P 500 historical return · Below 7% is illogical for single-stock risk
Full explanation → (the annual return you demand for single-stock risk) and terminal growth; the value updates live so you can see whether the stock looks cheaper or richer. The discount rate starts at 10.0%, the figure our model used for DIOD. Open Advanced to also change beta, growth and the rate path.
Note: no headline intrinsic value is published for this stock (the valuation is held for a data-quality reason — see the notes above). The calculator below is a what-if tool: the values it produces are your assumptions played out, not our estimate.
A full intrinsic value isn't shown for DIOD because the valuation is currently held for a data-quality reason (see the guardrail notes above). The reverse-DCF reading still works — it needs only the price and cash flow — but we won't publish a forward value until the underlying data passes our checks.
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⚙ Advanced — tinker with every input (beta, growth, rate path, margin → full intrinsic value)
A standard DCFDCF — Discounted Cash Flow — sums up all future cash a business will produce, adjusted for the fact that future dollars are worth less than dollars today.
Why it matters: It is the most fundamentally honest valuation method when applicable — but only works for companies with predictable, positive cash flow.
Reference: Best for: mature, profitable businesses. Fails for: pre-profit growth, banks, REITs.
Full explanation → valuation is not meaningful for Diodes Inc. because the model indicates an extreme valuation discrepancy, with the price being 5.3x the model's intrinsic valueIntrinsic Value — Our DCF model's estimate of what each share is mathematically worth based on projected cash flows.
Why it matters: Compare to current price. Below IV = potentially undervalued. Above IV = priced for growth that must actually happen.
Reference: Model-derived; quality depends on data and assumptions.
Full explanation →, suggesting the market is pricing in factors beyond trailing cash flows. Investors are likely betting on a turnaround in the declining revenue trend and potential margin expansion. The #1 quantifiable risk is the continued revenue decline of -4.8% per year over the last four years.
As of 4 months ago
Anatomy of a share
What you're buying per share. Bars are at the same scale so you can see the relative size of revenue, costs, cash flow, and debt — not just read them in a table.
What's free cash flow / what do these mean?
Revenue per share — how much the business earns from customers, divided by the number of shares outstanding. Top of the income statement.
Earnings per share — profit left after operating costs, interest, and taxes, per share. Two versions appear on this page and are not interchangeable: GAAP diluted EPS uses the company's weighted-average diluted share count during the reporting period (this is the "earnings" in "price-to-earnings"); net income per current share divides annual net income by today's share count. They differ whenever the share count has changed.
Owner-earnings free cash flow per share — the cash the business produces for shareholders. Savng's owner-earnings FCF subtracts capital expenditures and stock-based compensation from operating cash flow (SBC is a real dilution cost even though it's non-cash). This is deliberately more conservative than "standard" FCF, which subtracts only capital expenditures — so our figure is lower than the headline FCF you'll see elsewhere. FCF funds dividends, buybacks, debt repayment, and acquisitions; a company can report positive earnings yet negative FCF.
Debt per share — total interest-bearing borrowings divided by shares. High debt-per-share next to thin FCF-per-share is a fragility signal.
What you actually need to decide
Every stock price is a disagreement. Here's the single thing that must go right for the bulls, the single thing that breaks the thesis, and the concrete signposts to watch so you can update your view as real results arrive.
- Quarterly revenue growth returning to positive territory
- Stabilization or expansion of gross margins
- New product introductions gaining market traction
The trend, in plain numbers (FY2024 → FY2025, latest reported)
Straight from the financial statements — no model, no opinion. For a small or unprofitable company, the direction of these numbers usually tells you more than any single valuation.
- Revenue grew +13% to $1.48B.
- Free cash flow rose to $111.4M.
- Net income grew +50% to $66.1M.
- Gross margin shrank to 31% (-2 pts).
Management & Leadership
Diodes Inc. is led by CEO Keh-Shew Lu, who has been instrumental in the company's growth and strategic direction for many years. He also serves as the Chairman, providing consistent leadership.
What They Make
Diodes Inc. designs, manufactures, and supplies high-quality semiconductor products, primarily discrete, analog, and mixed-signal devices, for a broad range of applications across various end markets.
End Markets
Revenue Drivers
Why Is It Priced Like This?
Why Customers Pay
What we use instead: earnings (P/E, EV/EBIT), book value (P/B) — computed from the figures this company does report, shown in the sections below. Those numbers are unaffected by the missing cash-flow data.
The market is likely pricing Diodes Inc. based on expectations for a future turnaround in its declining revenue trend and potential for margin expansion, rather than its current cash flow. Despite positive net income and operating cash flow, the market may be anticipating a re-acceleration of decline beyond the current 4.8%/yr revenue decline and a reversal of the compressing gross margins (37.1% to 31.2%).
Business Model & Valuation
How They Make Money
The company funds itself through positive operating cash flow, and its long-term debt has been falling from $285M to $26M.
Free Cash Flow DCF
Standard FCF DCF: positive free cash flow in a sector suited for cash-flow-based valuation. High P/FCF (43x) - market pricing significant growth.
Show advanced inputs
| Revenue Growth | -4.8% |
| Eps Growth | -26.9% |
| Historical Fcf Growth | -9.2% |
| Sector Default | 12.0% |
| Best Estimate | 3.0% |
| Method | blend(70% revenue_cagr, 30% sector) |
| Growth Basis | total |
What this model does NOT do: this is a consolidated owner-earnings FCF model. Standalone segment assumptions: none. It does not project product, services and recurring/cloud lines independently; their combined effect is embedded in the historical revenue and cash-flow trend the model extrapolates. The calculator above can only approximate a segment's impact through the single consolidated growth rate — it cannot model any one line separately. For a true segment-level view, build a separate model from the company's segment disclosures.
Maturity & Competitive Position
Moat Signals
Revenue has been declining at -4.8%/yr over the last four years, from $1805M to $1482M.
Geography & Markets
Diodes Inc. is headquartered in the US but operates globally, with significant manufacturing and sales presence across Asia, Europe, and North America. Exact geographic mix percentages are not available from current data sources.
Geographic Risks
Market Signals
These are timing signals, not value signals — they describe the stock's recent price behavior, not what the business is worth. Use them for the "the thesis looks good, but is now the moment?" question. Each tile below explains what it's saying.
Why it matters: Short-term contrarian indicator. Extreme readings often precede mean reversion, though not always.
Reference: 30–70 normal · >70 overbought · <30 oversold
Full explanation → (14)55.8NeutralMomentum is balanced — neither overbought nor oversold.
Why it matters: When the fast line crosses above the slow line, short-term momentum is turning up; below, turning down. A timing cue, not a value signal.
Reference: Line above signal = bullish momentum · below = bearish
Full explanation →BearishLine below signalThe fast trend is below the slow trend — short-term momentum is currently downward.
Technicals describe price, not the business. A great company can have a "bearish" tape (a buying chance) and a weak one a "bullish" tape (a trap). Pair these with the valuation and health sections above.
QUALITY
Data Quality & Risk Flags (4 notes — click to expand/collapse)
Guardrail Notes (4)
- Terminal growth (3%) capped to 2.4% (80% of near-term growth 3%).
- Price is far above the model output - market may be pricing optionality, narrative catalysts, or margin expansion beyond what trailing cash flows support.
- Extreme valuation (P/IV withheld — see the note above); output dominated by data/units issue (often a multi-class share-count mismatch). Suppressed.
- DATA UNAVAILABLE: per-share values suppressed due to missing/unreliable shares data.
FINANCIALS
Financial Statements (5-year tables — click to expand)
From Diodes Inc /Del/'s SEC filings (EDGAR).
Income (5yr)
| Year | Revenue | Net Income | EPS |
|---|---|---|---|
| 2025 | 1.5B | 66.1M | $1.43 |
| 2024 | 1.3B | 44.0M | $0.95 |
| 2023 | 1.7B | 227.2M | $4.91 |
| 2022 | 2.0B | 331.3M | $7.20 |
| 2021 | 1.8B | 228.8M | $5.00 |
Cash Flow (5yr)
| Year | Operating CF | CapEx | − SBC & adj. | Free Cash Flow |
|---|---|---|---|---|
| 2025 | 215.5M | 78.4M | 25.7M | 111.4M |
| 2024 | 119.4M | 73.0M | 22.8M | 23.6M |
| 2023 | 280.9M | 150.8M | 30.9M | 99.2M |
| 2022 | 392.5M | 211.7M | 36.3M | 144.5M |
| 2021 | 338.5M | 141.2M | 33.2M | 164.1M |
How we define FCF: operating cash flow − capital expenditure − stock-based compensation (owner-earnings basis — SBC is a real cost to shareholders even though it's non-cash). Latest year: 215.5M − 78.4M − 25.7M (SBC & adj.) = 111.4M. This is the same owner-earnings FCF definition the valuation model uses.
Balance Sheet
| Total Assets | 2.4B |
| Total Liabilities | 509.7M |
| Equity | 1.9B |
| Total Debt | 25.7M |
Similar companies worth a look
Same sector and industry, similar fundamentals shape. Verify everything yourself — this list is computed mechanically and does not reflect our judgment about whether any of these are a good investment.
The questions people ask about DIOD
Is Diodes Inc /Del/ (DIOD) a good stock to buy?
We do not publish a single fair value for Diodes Inc /Del/, because one number would not be reliable for this business (the page explains why). Judge it on what today's price assumes, its financial-health checks and what insiders are doing, all shown here from SEC filings. This is educational research from SEC filings, not investment advice.
Is Diodes Inc /Del/ (DIOD) overvalued?
A single fair-value number is not reliable for Diodes Inc /Del/, so we do not call it overvalued or undervalued. The page shows what growth today's price assumes and how the company's finances look instead. This is educational research from SEC filings, not investment advice.
What growth is priced into DIOD?
Working backwards from today's price, the market is counting on roughly 26.7% a year growth in DIOD's cash flow over the next decade. Compare that with the company's actual record on this page.
Where do these numbers come from?
From Diodes Inc /Del/'s own SEC filings (10-K and 10-Q), Form 4 insider filings and daily market prices. Every figure on the page links to how it was calculated, and the model's weak spots are listed next to its results.