Yankey Engineering Co Ltd (6691) fair value: what the stock is really worth
As of Sep 24, 2026: fair value of Yankey Engineering Co Ltd TWD 380, price TWD 667, upside -43.0%, quality 55 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 24, 2026.
How to read this chart
60‑month range 52.00 TWD – 700.84 TWD · fair‑value band 266.77 TWD – 910.59 TWD · the 667.00 TWD price screens above the 380.13 TWD fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 24, 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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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. 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 667.00 TWD, while our model-based Fair Value estimate is 380.13 TWD, implying the stock looks roughly 75.5% overvalued today.
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Valuation
Bull case: the Growth Earnings group reads highest at a median of 881.96 TWD per share, and 8 of the 26 models we run sit above the 667.00 TWD price.
Bear case: the Asset-Based group reads lowest at 42.18 TWD, and 18 of the 26 models stay below the price. Evidence for this calculation is high.
Scenario range: 266.77 TWD (bear) to 910.59 TWD (bull), the price of 667.00 TWD sits inside 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 55/100 (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 87.6B TWD (≈ $2.7B) · P/E ratio 24.7 · P/S ratio 3.30 · EPS (TTM) 26.97 TWD · Dividend yield 3.1% · Net margin 13.4% · Return on equity 58.2% · Return on assets (EBIT) 17.5%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 48 out of 100 (low confidence).
What moves the price
The share trades about 5% below its 52-week high and 76% above its 52-week low, currently above its 200-day average.
For context, the median of 10 Industrials peers we cover trades at −31% fair-value upside, at −43%, 6691 screens richer than that median.
Fair Value models
Bear 266.77 TWDFair Value 380.13 TWDBull 910.59 TWD
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above is their evidence-weighted blend, not the output of a single model. Based on fiscal year 2025 figures (about 9 months old). Earnings retained since then (2.72 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.Evidence ⓘEvidence = 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.
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%
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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.
+36.2%
Earnings growth per share plus dividend.
Earnings per share, growth per year+33.1%
Dividend (yield on the price)3.1%
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).
+24.6%
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 +22.7% a year for the price.
Compare Yankey Engineering Co Ltd with another stock
Price, fair value, quality and upside side by side.
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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 · 822 stocks
Beats the industry median on 8/13 measures
Overall it ranks above its industry peers.
Valuation
Quality Score55 · Above median
Fair Value upside−41% · Below median
Profitability
Return on equity (TTM)58% · Top 25%
Return on assets13% · Top 25%
Net margin (TTM)13% · Top 25%
Operating margin (TTM)16% · Top 25%
Growth and dividend
Revenue growth77% · Top 25%
Dividend yield (TTM)3.1% · Above median
Valuation Multiplesvs Engineering & Construction median · lower = cheaper
P/E (TTM)24.7× · Pricier than median
P/B11.53× · Priciest 25%
P/S (TTM)3.45× · Priciest 25%
P/FCF2.0× · Cheaper than median
EV/EBITDA19.9× · Priciest 25%
Strength profile in five axes (Snowflake)
This stockSector peers
VALUE (fair-value potential)0· sector 24
FUTURE (revenue growth)100· sector 13
PAST (return on equity)100· sector 27
HEALTH (low debt)100· sector 94
DIVIDEND (yield)63· sector 40
VALUE 0: the price sits above our fair-value range.
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 Sep 24, 2026, our model estimates a fair value of 380.13 TWD versus a price of 667.00 TWD, about −43% upside (overvalued).
What is the fair value of 6691?
Our model-based fair value for Yankey Engineering Co Ltd is 380.13 TWD (as of Sep 24, 2026), built from audited fundamentals. The current price: 667.00 TWD.
What is the quality score of 6691?
Yankey Engineering Co Ltd has a Quality Score of 55/100. 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 380.13 TWD (as of Sep 24, 2026) from 26 valuation models. Cautious scenario 266.77 TWD, optimistic scenario 910.59 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 380.13 TWD, about −43% upside versus a price of 667.00 TWD (overvalued). Cautious scenario 266.77 TWD, optimistic scenario 910.59 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 25.4B TWD (latest available figure, as of Sep 24, 2026).
Does Yankey Engineering Co Ltd pay a dividend?
Yankey Engineering Co Ltd currently shows a dividend yield of about 3.15% relative to its recent price (as of Sep 24, 2026).
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 +24.6 % per year for five years (discount rate 8.6 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +33.1 % per year. As of Sep 24, 2026.
What discount rate (WACC) does the fair value of 6691 use?
Our models discount Yankey Engineering Co Ltd at 8.6 %: a base by market capitalisation (large), damped by beta 0.45, 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 +24.6 % per year a year over ten years, using the same discount rate (8.6 %) 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 +24.6 % per year free-cash-flow growth a 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 +4.7 % a year. That is the yardstick for the growth priced into Yankey Engineering Co Ltd (+24.6 % per year a 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 1.74 %: that much free cash flow Yankey Engineering Co Ltd produces per unit of market value. When it exceeds the discount rate of our models (8.6 %), 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 380.13 TWD per share (as of Sep 24, 2026), against a price of 667.00 TWD. It is the blended result of 26 valuation models (cash flow, earnings, asset, dividend).
Is Yankey Engineering Co Ltd stock overvalued or undervalued in 2026?
As of Sep 24, 2026, 6691 trades above its calculated fair value: price 667.00 TWD, fair value 380.13 TWD, a gap of about −43% (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 (667.00 TWD); the fair value is what the company's own numbers justify (380.13 TWD). For Yankey Engineering Co Ltd the two are 286.87 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 87.6B TWD (market capitalisation, as of Sep 24, 2026). Per share that is 667.00 TWD; our models calculate a fair value of 380.13 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 266.77 TWD, base 380.13 TWD, optimistic 910.59 TWD per share (as of Sep 24, 2026, price 667.00 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 24.7 (as of Sep 24, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of 380.13 TWD is built from several models across several years. Other multiples: P/B 11.5, P/S 3.4, EV/EBITDA 19.9.
How solid is the balance sheet of Yankey Engineering Co Ltd (6691)?
Balance-sheet figures for Yankey Engineering Co Ltd (as of Sep 24, 2026): return on equity 58.2%. They feed the Quality Score of 55/100, which measures business quality independently of the share price.
How far is 6691 from its 52-week high?
Yankey Engineering Co Ltd trades at 667.00 TWD, about 5% below its 52-week high of 700.84 TWD and 76% above the low of 379.44 TWD (as of Sep 24, 2026). Distance from the high says nothing about value: that is what the fair value of 380.13 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, Comfort Systems USA, Inc, Larsen & Toubro Limited, 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 Sep 24, 2026: price 667.00 TWD, calculated fair value 380.13 TWD (−43%), Quality Score 55/100, 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 four families: discounted cash flow, earnings models, asset and balance-sheet models, and dividend models. Every model gets the same audited fundamentals; the result is the weighted average of 380.13 TWD, 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 14.1 % 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 Sep 24, 2026 was 667.00 TWD. Our model-based fair value is 380.13 TWD, about −43% upside (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 model range is unusually wide (266.77 TWD to 910.59 TWD). The outcome hinges heavily on assumptions, so read the point estimate with caution. Solid but not exceptional quality (55/100) and above fair value, neither a clear bargain nor a standout compounder.
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 87.6B TWD (≈ $2.7B). 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 3.30 (P/E × margin). 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 26.97 TWD (price ÷ EPS = P/E 24.7). 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 3.1% (payout 77.9%). 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 13.4% (fiscal year 2025). 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 58.2% (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 15.7% (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 +76.8% 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 +45.1% 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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