Yankey Engineering Co Ltd (6691) fair value: what the stock is really worth
As of Nov 6, 2026: fair value (intrinsic value) of Yankey Engineering Co Ltd stock TWD 346, price TWD 534, that is 35.3% below the price, quality 56 out of 100. Rating: strongly overvalued. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.
69 individual criteria per stock, every one traceableSee the method →
Price vs Fair Value
White line = price, green steps = our fair value per fiscal year. As of Nov 7, 2026.
How to read this chart
60‑month range 61.05 TWD – 2,573 TWD · fair‑value band 225.80 TWD – 464.92 TWD · the 534.00 TWD price screens above the 345.58 TWD fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). As of Nov 7, 2026.
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Yankey Engineering Co., Ltd. offers engineering services in Taiwan, China, and Thailand. The company designs and installs clean room systems, refrigeration and air conditioning systems, and ice-making systems; and sells materials for these systems.
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It also provides mechanical, electrical, and plumbing turnkey services for commercial office buildings; and high and low voltage transmission system installation, fire protection system, process pipeline system, water supply and drainage system, process exhaust system, and CCTV and security public address system, as well as green energy technology services.
Yankey Engineering Co., Ltd. was founded in 1980 and is headquartered in New Taipei City, Taiwan.
Stock analysis
Yankey Engineering Co Ltd (6691) currently trades at 534.00 TWD, while our model-based Fair Value estimate is 345.58 TWD, 35% below the price, so the stock looks overvalued today.
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Valuation
Bull case: the Growth Earnings group reads highest at a median of 801.78 TWD per share, and 7 of the 26 models we run sit above the 534.00 TWD price.
Bear case: the Asset-Based group reads lowest at 49.18 TWD, and 19 of the 26 models stay below the price. Data coverage for this calculation is high.
Scenario range: 225.80 TWD (bear) to 464.92 TWD (bull), the price of 534.00 TWD sits above it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 56/100 (solid quality), in the Industrials sector.
Mixed Growth: Revenue is growing, but margins or cash flow do not fully confirm the trend.
Yankey Engineering Co Ltd reported revenue of 22.4B TWD in FY2025 versus 10.7B TWD in FY2021, a compound +20.3%/yr. Reported net income was 3.0B TWD in FY2025, compounding +32.9%/yr from FY2021.
Key figures
Market cap 72.5B TWD (≈ $2.2B) Mid · P/E ratio 18.6 · P/S ratio 2.37 · EPS (TTM) 28.78 TWD · Dividend yield 3.6% · Net margin 13.2% · Return on equity 61.1% · Return on assets (EBIT) 17.5% (5-year average).
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 73 out of 100 (low confidence).
What moves the price
The share trades about 33% below its 52-week high and 41% above its 52-week low, currently below its 200-day average.
For context, the median of 10 Industrials peers we cover trades at −42% fair-value upside, at −35%, 6691 screens cheaper than that median.
Fair Value models
Bear225.80 TWDFair Value 345.58 TWDBull464.92 TWD
Price 534.00 TWD · Downside -35.3%
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above starts from their evidence-weighted blend, not from a single model. In cyclical trough or peak years, after dilution or a stock split it is adjusted afterwards, so it can sit above or below the models. Based on fiscal year 2025 figures (about 10 months old). Earnings retained since then (8.28 TWD per share) are deliberately not added.Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target. If a model's bull case is above four times its base value, the table shows that limit with a > sign (like the overall Bull above): beyond it no assumption holds.Coverage ⓘCoverage = how well-backed THIS model's estimate is for this stock (0–100): how complete and reliable its input data are, and how well the model fits the company. The final Fair Value is an evidence-weighted blend, so better-evidenced models count more. Green ≥70, amber 50–69, grey below 50.
Best data coverage
FCF DCF202.63 TWD289.92 TWD560.42 TWD77
Growth DCF192.51 TWD313.12 TWD546.97 TWD76
EPV235.43 TWD266.12 TWD292.47 TWD74
All 26 models by family
DCF Models
FCF DCF202.63 TWD289.92 TWD560.42 TWD77
Owner Earnings166.41 TWD320.64 TWD628.93 TWD72
5Y Revenue Exit252.13 TWD430.83 TWD806.64 TWD69
5Y EBITDA Exit288.44 TWD504.23 TWD928.22 TWD72
5Y P/E Exit345.17 TWD770.09 TWD1,357 TWD67
10Y Revenue Exit230.87 TWD509.74 TWD702.18 TWD66
10Y EBITDA Exit265.65 TWD585.55 TWD1,156 TWD64
10Y P/E Exit305.81 TWD703.97 TWD1,376 TWD60
Earnings-Based
Graham-Dodd153.04 TWD1,067 TWD1,498 TWD63
Lynch FV452.44 TWD646.35 TWD840.25 TWD61
PEG = 1.0452.44 TWD646.35 TWD840.25 TWD57
EPV235.43 TWD266.12 TWD292.47 TWD74
Dividend Discount
Gordon GGM109.46 TWD215.21 TWD321.44 TWD67
DDM Multi-Stage109.46 TWD187.41 TWD227.56 TWD67
Multiples
P/E Multiple354.46 TWD472.61 TWD590.76 TWD63
P/S Multiple252.74 TWD336.99 TWD421.24 TWD58
P/B Multiple192.54 TWD256.72 TWD320.90 TWD55
EV/EBIT394.51 TWD513.62 TWD632.73 TWD66
EV/EBITDA314.21 TWD406.56 TWD498.90 TWD67
EV/Revenue249.49 TWD340.47 TWD431.46 TWD54
Asset-Based
NCAV (Graham)32.46 TWD49.18 TWD61.48 TWD54
Growth DCF
Growth DCF192.51 TWD313.12 TWD546.97 TWD76
Rev-Margin DCF262.44 TWD486.97 TWD927.02 TWD69
Economic Profit
Residual Income137.32 TWD183.58 TWD385.94 TWD71
ROIC Compounder258.48 TWD320.39 TWD393.09 TWD72
Growth Earnings
Growth-Adj P/E561.25 TWD801.78 TWD1,042 TWD67
The fair value above starts from this blend and is adjusted for dilution from new shares.
Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card.86/100
Revenue is growing, but margins or cash flow do not fully confirm the trend.
Revenue growth 1 year
+47.1%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+17.0%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+33.1%
Start year 2020 (pandemic)
Revenue growth 6 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+27.6%
’19
’20
’21
’22
’23
’24
’25
What shareholders gained per year (last 5 years), in TWD ⓘWhat the business itself delivers per year: earnings growth per share plus the dividend yield. This is what you get IF the market keeps valuing the stock the same way: it contains no assumption about the market changing its mind. Computed per share, so buybacks count and a merger does not pass as growth. For a company that pays no dividend it is pure earnings growth per share. Period: earnings growth per share as CAGR over the last 5 reported fiscal years (annual statements), plus the current dividend yield. The start value is the median of the three years around the start, so a single crisis year (a pandemic or a write-down) does not distort the rate. Measured in TWD: this currency has depreciated against the euro and dollar over the long run, so part of the nominal rate is currency erosion that never reaches a EUR/USD investor.
+36.7%
Earnings growth per share plus dividend.
Earnings per share, growth per year+33.1%
Dividend (yield on the price)3.6%
Profit margin 2020 to 2025 ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.11% → 17%
Growth Forecast
Little optimism in the price
The price assumes less growth than the company has delivered so far.
What the price assumes ⓘThis turns our valuation around: instead of asking what the share is worth, it asks what growth the current price requires. It uses the cash the company keeps after all spending (free cash flow), the same discount rate as our models, five years of growth, then slowing evenly to 2 % a year by year ten. Compared with the analysts' sales forecasts extended to the same five years (at least three analysts, for context only, it does not enter the Fair Value): within 3 percentage points counts as "in line" (amber), below that little optimism (green), above that a lot of optimism (red).
+26.9%
Yearly growth needed for the next five years to justify today's price.
What forecasts expect
n/a
No analyst forecast available.
After inflation (Taiwan: IMF forecast 1.6% a year to 2030, 1.5% from 2016 to 2025) that is about +24.9% a year for the price.
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Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Engineering & Construction · 791 stocks
Beats the industry median on 7/13 measures
A mixed picture versus its industry peers.
Valuation
Quality Score56 · Above median
Fair Value upside−35.3% · Below median
Profitability
Return on equity (12 months)61.1% · Top 25%
Return on assets15.3% · Top 25%
Net margin (12 months)13.2% · Top 25%
Operating margin (12 months)16.5% · Top 25%
Growth and dividend
Revenue growth (quarter YoY)89.3% · Top 25%
Dividend yield (12 months)3.6% · Above median
Valuation Multiplesvs Engineering & Construction median · lower = cheaper
For bloggers, editors and developers: paste this into your site or blog (a “Custom HTML” block in WordPress), it shows the current fair value and links back here. Free, plain HTML, and welcome. Full data streams (CSV/JSON) at /developers.
Cite: Fair Value Calculator (2026). "Yankey Engineering Co Ltd Fair Value". https://www.fairvalue-calculator.com/stock/6691
Frequently asked questions
Is Yankey Engineering Co Ltd (6691) overvalued or undervalued?
As of Nov 7, 2026, our model estimates a fair value of 345.58 TWD versus a price of 534.00 TWD, about 35% lower (overvalued).
What is the fair value of 6691?
Our model-based fair value for Yankey Engineering Co Ltd is 345.58 TWD (as of Nov 7, 2026), built from audited fundamentals. The current price: 534.00 TWD.
What is the quality score of 6691?
Yankey Engineering Co Ltd has a Quality Score of 56/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for Yankey Engineering Co Ltd (6691)?
Our model-based price target is the fair value of 345.58 TWD (as of Nov 7, 2026) from 26 valuation models. Cautious scenario 225.80 TWD, optimistic scenario 464.92 TWD. It is a calculation from audited fundamentals, not an analyst target.
What is the Yankey Engineering Co Ltd stock forecast for 2026?
Our models put fair value at 345.58 TWD, about 35% lower versus a price of 534.00 TWD (overvalued). Cautious scenario 225.80 TWD, optimistic scenario 464.92 TWD. The calculation is refreshed regularly with new filings.
What is the revenue of Yankey Engineering Co Ltd (6691)?
Yankey Engineering Co Ltd reported trailing-twelve-month revenue of about 30.6B TWD (latest available figure, as of Nov 7, 2026).
Does Yankey Engineering Co Ltd pay a dividend?
Yankey Engineering Co Ltd currently shows a dividend yield of 3.58% relative to its recent price (as of Nov 7, 2026).
How much is the dividend of Yankey Engineering Co Ltd (6691) and when is the ex-dividend date?
Yankey Engineering Co Ltd pays a dividend of 19.09 TWD per share a year, a dividend yield of 3.6%. The last ex-dividend date was Aug 20, 2026. A dividend has been paid every year since at least 2019. The payout ratio is 66.3% of earnings. Free cash flow covers the dividend 0.55 times. Our assessment: Watch coverage. The dividend isn’t fully covered by free cash flow or earnings, part of it is funded from reserves or debt. Fine for now, but worth watching: if it stays uncovered, the dividend could be cut.
What growth is priced into Yankey Engineering Co Ltd (6691)?
For today's price to be fair in a discounted-cash-flow model, Yankey Engineering Co Ltd would have to grow free cash flow by +26.9 % per year for five years (discount rate 9.7 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +33.1 % per year. As of Nov 7, 2026.
What discount rate (WACC) does the fair value of 6691 use?
Our models discount Yankey Engineering Co Ltd at 9.7 %: a base by market capitalisation (mid), damped by beta 0.76, country premium for Taiwan. The same rate applies in all 26 models.
What is a reverse DCF?
A reverse DCF turns the usual calculation around. Instead of deriving a value from assumptions, it takes today's price as given and asks: what free-cash-flow growth would a company have to deliver for exactly this price to be fair? The result is not a forecast but the expectation already priced in. For Yankey Engineering Co Ltd that is +26.9 % per year for five years, then slowing evenly to 2 % by year ten, using the same discount rate (9.7 %) and the same formula as our fair value.
How much growth has Yankey Engineering Co Ltd (6691) delivered so far?
Over the past 5 years revenue at Yankey Engineering Co Ltd grew +33.1 % a year. The price currently implies free-cash-flow growth of +26.9 % per year. Comparing the two shows how much confidence is in the price: if it demands more than has been delivered, the business has to accelerate for the maths to work.
How fast is the sector of Yankey Engineering Co Ltd (6691) growing?
The median revenue growth in the sector is +7.8 % a year. That is the yardstick for the growth priced into Yankey Engineering Co Ltd (+26.9 % per year): it shows whether the expectation is within the usual range or beyond it.
What is the free cash flow yield of Yankey Engineering Co Ltd (6691)?
The free-cash-flow yield on the price is 1.86 %: that much free cash flow Yankey Engineering Co Ltd produces per unit of market value. When it exceeds the discount rate of our models (9.7 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of Yankey Engineering Co Ltd (6691)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Yankey Engineering Co Ltd it is 345.58 TWD per share (as of Nov 7, 2026), against a price of 534.00 TWD. It is the blended result of 26 valuation models in 8 families (DCF Models, Earnings-Based, Dividend Discount, Multiples, Asset-Based, Growth DCF, Economic Profit, Growth Earnings).
Is Yankey Engineering Co Ltd stock overvalued or undervalued in 2026?
As of Nov 7, 2026, 6691 trades above its calculated fair value: price 534.00 TWD, fair value 345.58 TWD, a gap of about −35% (overvalued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of 6691?
No. The price is what the market pays today (534.00 TWD); the fair value is what the company's own numbers justify (345.58 TWD). For Yankey Engineering Co Ltd the two are 188.42 TWD per share apart. That gap is exactly why we show both numbers side by side.
How much is Yankey Engineering Co Ltd worth?
The market values Yankey Engineering Co Ltd at about 72.5B TWD (market capitalisation, as of Nov 7, 2026). Per share that is 534.00 TWD; our models calculate a fair value of 345.58 TWD per share.
What do the bullish and bearish scenarios say about 6691?
Our models span a range for Yankey Engineering Co Ltd: cautious scenario 225.80 TWD, base 345.58 TWD, optimistic 464.92 TWD per share (as of Nov 7, 2026, price 534.00 TWD). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of 6691?
Yankey Engineering Co Ltd trades at a price-to-earnings ratio of 18.6 (as of Nov 7, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of 345.58 TWD is built from several models across several years. Other multiples: P/B 9.6, P/S 2.4, EV/EBITDA 13.4.
How solid is the balance sheet of Yankey Engineering Co Ltd (6691)?
Balance-sheet figures for Yankey Engineering Co Ltd (as of Nov 7, 2026): return on equity 61.1%. They feed the Quality Score of 56/100, which measures business quality independently of the share price.
How far is 6691 from its 52-week high?
Yankey Engineering Co Ltd trades at 534.00 TWD, about 33% below its 52-week high of 794.00 TWD and 41% above the low of 379.44 TWD (as of Nov 6, 2026). Distance from the high says nothing about value: that is what the fair value of 345.58 TWD is for.
Which stocks are comparable to Yankey Engineering Co Ltd?
From the same area (Industrials) we also value Quanta Services, Inc, Vinci SA, Larsen & Toubro Limited, Comfort Systems USA, Inc, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is Yankey Engineering Co Ltd stock attractive at the current price?
The data as of Nov 7, 2026: price 534.00 TWD, calculated fair value 345.58 TWD (−35%), Quality Score 56/100, from 26 models. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
How is the fair value of 6691 calculated?
We run Yankey Engineering Co Ltd through 26 models from 8 families: DCF Models, Earnings-Based, Dividend Discount, Multiples, Asset-Based, Growth DCF, Economic Profit, Growth Earnings. Every model gets the same audited fundamentals; the fair value of 345.58 TWD builds on their evidence-weighted average, with the spread shown as a cautious and an optimistic scenario.
Is it still worth investing in stocks now?
The global stock market currently sits 13.0% above its aggregate fair value. Yankey Engineering Co Ltd itself currently trades above fair value. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of Yankey Engineering Co Ltd (6691)?
The closing price on Nov 6, 2026 was 534.00 TWD. Our model-based fair value is 345.58 TWD, about 35% lower (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Yankey Engineering Co Ltd right now?
The price sits above even our optimistic bull case (464.92 TWD). The favourable scenario is already priced in. Solid but not exceptional quality (56/100) and above fair value, neither a clear bargain nor a standout compounder. A fairly wide model range (225.80 TWD to 464.92 TWD) leaves room in how you read the outcome.
Key figures of Yankey Engineering Co Ltd
How large is the market capitalisation of Yankey Engineering Co Ltd (6691)?
The market capitalisation of Yankey Engineering Co Ltd is 72.5B TWD (≈ $2.2B). The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What is the P/S ratio of Yankey Engineering Co Ltd (6691)?
The price-to-sales ratio of Yankey Engineering Co Ltd is 2.37 (last twelve months). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What are the earnings per share of Yankey Engineering Co Ltd (6691)?
Earnings per share at Yankey Engineering Co Ltd are 28.78 TWD (price ÷ EPS = P/E 18.6). Earnings per share over the last twelve months: total profit spread across every single share.
What is the dividend yield of Yankey Engineering Co Ltd (6691)?
The dividend yield of Yankey Engineering Co Ltd is 3.6% (payout 66.3%). Yearly dividend relative to the share price. 3% pays 3 per 100 invested. Below: how much of profit is used for it.
What is the net margin of Yankey Engineering Co Ltd (6691)?
The net margin of Yankey Engineering Co Ltd is 13.2% (last twelve months). How much of every unit of revenue ends up as profit. 10% means 10 cents of profit per dollar of sales.
What is the return on equity of Yankey Engineering Co Ltd (6691)?
The return on equity (ROE) of Yankey Engineering Co Ltd is 61.1% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of Yankey Engineering Co Ltd (6691)?
On an EBIT basis the return on assets of Yankey Engineering Co Ltd is 17.5% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of Yankey Engineering Co Ltd (6691)?
The operating margin of Yankey Engineering Co Ltd is 16.5% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Yankey Engineering Co Ltd (6691)?
Revenue at Yankey Engineering Co Ltd is growing +89.3% versus a year earlier (3y avg +17.0%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How fast are earnings growing at Yankey Engineering Co Ltd (6691)?
Earnings per share at Yankey Engineering Co Ltd are growing +115% versus a year earlier. How much earnings per share grew versus a year earlier.
How much net cash does Yankey Engineering Co Ltd (6691) hold?
Yankey Engineering Co Ltd holds more cash than debt, 4.9B TWD net (fiscal year 2025). The company holds more cash than debt, a safety cushion.
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Broad data
Nov 7, 2026