Y-Optics Manufacture Co. Ltd (066430) fair value: what the stock is really worth
As of Nov 6, 2026: fair value (intrinsic value) of Y-Optics Manufacture Co. Ltd stock KRW 580, price KRW 1,590, that is 63.5% below the price, quality 49 out of 100. Rating: strongly overvalued. Calculated from audited financials with 14 of our 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 9, 2026.
How to read this chart
60‑month range 474.00 KRW – 4,295 KRW · fair‑value band 406.20 KRW – 754.38 KRW · the 1,590 KRW price screens above the 580.29 KRW fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). 1 fiscal year is left out: there the valuation rested on only a fraction of the usual models. As of Nov 9, 2026.
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I-ROBOTICS,Co.,Ltd. engages in the manufacture and sale of polyethylene films. The company offers low density polyethylene, high-density polyethylene, linear low-density polyethylene, and anti-corrosion films. It also provides films, lamination films, general packaging films, and scratch wrap films.
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In addition, the company engages in the polyethylene raw material distribution business. Additionally, it designs, manufactures, and validates harmonic drives and RV drives. The company was formerly known as Y-Optics Manufacture Co., Ltd. and changed its name to I-ROBOTICS,Co.,Ltd. in July 2025.
I-ROBOTICS,Co.,Ltd. was founded in 1999 and is headquartered in Gimhae-si, South Korea.
Stock analysis
Y-Optics Manufacture Co. Ltd (066430) currently trades at 1,590 KRW, while our model-based Fair Value estimate is 580.29 KRW, 64% 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 580.29 KRW per share, and 1 of the 14 models we run sit above the 1,590 KRW price.
Bear case: the Asset-Based group reads lowest at 80.53 KRW, and 13 of the 14 models stay below the price. Data coverage for this calculation is medium.
Scenario range: 406.20 KRW (bear) to 754.38 KRW (bull), the price of 1,590 KRW 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 49/100 (below-average quality), in the Basic Materials sector.
Mixed Growth: Revenue is growing, but margins or cash flow do not fully confirm the trend.
Y-Optics Manufacture Co. Ltd reported revenue of 36.4B KRW in FY2025 versus 37.3B KRW in FY2021, a compound −0.6%/yr. Reported net income was 1.7B KRW in FY2025, compounding +44.1%/yr from FY2021.
Key figures
Market cap 61.6B KRW (≈ $45.6M) Micro · P/E ratio 77.5 · P/S ratio 3.62 · EPS (TTM) 24.49 KRW · Net margin 4.7% · Return on equity 7.5% · Return on assets (EBIT) 0.8% (5-year average) · Operating margin 1.9%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 29 out of 100 (low confidence).
What moves the price
The share trades about 63% below its 52-week high and 55% above its 52-week low, currently below its 200-day average.
For context, the median of 10 Basic Materials peers we cover trades at −43% fair-value upside, at −64%, 066430 screens richer than that median.
Fair Value models
The price assumes far more growth than our models allow for, so the models scatter widely (7.28 KRW to 2,021 KRW). Read the Fair Value as a cautious anchor, not a price target; the Growth Forecast section shows what the price assumes.
Bear406.20 KRWFair Value 580.29 KRWBull754.38 KRW
Price 1,590 KRW · Downside -63.5%
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 (21.00 KRW 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.
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.24/100
Revenue is growing, but margins or cash flow do not fully confirm the trend.
Revenue growth 1 year
+0.8%
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.
−0.9%
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.
+2.8%
Start year 2020 (pandemic). Over 10 years: +18.4% a year
Revenue growth 14 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.
+15.6%
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What shareholders gained per year (last 5 years), in KRW ⓘ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 KRW: 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.
−8.0%
Earnings growth per share plus dividend.
Earnings per share, growth per year−8.0%
Dividend (yield on the price)0.0%
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.3% → 1%
⚠ Revenue per share shrinking 10.3%/yr over ~7Y (margins eroding too) ⓘStructural-decline marker: revenue PER SHARE has fallen over the last decade (robust median trend, not a single year). Backtested across 2005 to 2017, such businesses trailed the market by about 2.5 percentage points per year. Display only: it does not change the fair value or the quality score.
Compare Y-Optics Manufacture Co. Ltd with another stock
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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.Specialty Chemicals · 728 stocks
Beats the industry median on 3/11 measures
Overall it trails its industry peers.
Valuation
Quality Score49 · Below median
Fair Value upside−63.5% · Bottom 25%
Profitability
Return on equity (12 months)7.5% · Above median
Return on assets3.3% · Above median
Net margin (12 months)4.7% · Below median
Operating margin (12 months)1.9% · Bottom 25%
Growth and dividend
Revenue growth (quarter YoY)−3.5% · Bottom 25%
Valuation Multiplesvs Specialty Chemicals median · lower = cheaper
P/E (12 months)77.5× · Priciest 25%
P/B1.40× · Cheaper than median
P/S (12 months)2.09× · Pricier than median
EV/EBITDA47.4× · Priciest 25%
Strength profile in five axes (Snowflake)
This stockSector peers
VALUE (fair-value potential)0· sector 0
FUTURE (revenue growth)0· sector 67
PAST (return on equity)30· sector 27
HEALTH (low debt)100· sector 95
DIVIDEND (yield)0· sector 31
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.
Is Y-Optics Manufacture Co. Ltd (066430) overvalued or undervalued?
As of Nov 9, 2026, our model estimates a fair value of 580.29 KRW versus a price of 1,590 KRW, about 64% lower (overvalued).
What is the fair value of 066430?
Our model-based fair value for Y-Optics Manufacture Co. Ltd is 580.29 KRW (as of Nov 9, 2026), built from audited fundamentals. The current price: 1,590 KRW.
What is the quality score of 066430?
Y-Optics Manufacture Co. Ltd has a Quality Score of 49/100. 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 Y-Optics Manufacture Co. Ltd (066430)?
Our model-based price target is the fair value of 580.29 KRW (as of Nov 9, 2026) from 14 valuation models. Cautious scenario 406.20 KRW, optimistic scenario 754.38 KRW. It is a calculation from audited fundamentals, not an analyst target.
What is the Y-Optics Manufacture Co. Ltd stock forecast for 2026?
Our models put fair value at 580.29 KRW, about 64% lower versus a price of 1,590 KRW (overvalued). Cautious scenario 406.20 KRW, optimistic scenario 754.38 KRW. The calculation is refreshed regularly with new filings.
What is the revenue of Y-Optics Manufacture Co. Ltd (066430)?
Y-Optics Manufacture Co. Ltd reported trailing-twelve-month revenue of about 29.5B KRW (latest available figure, as of Nov 9, 2026).
What is the intrinsic value of Y-Optics Manufacture Co. Ltd (066430)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Y-Optics Manufacture Co. Ltd it is 580.29 KRW per share (as of Nov 9, 2026), against a price of 1,590 KRW. It is the blended result of 14 valuation models in 5 families (Earnings-Based, Multiples, Asset-Based, Economic Profit, Growth Earnings).
Is Y-Optics Manufacture Co. Ltd stock overvalued or undervalued in 2026?
As of Nov 9, 2026, 066430 trades above its calculated fair value: price 1,590 KRW, fair value 580.29 KRW, a gap of about −64% (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 066430?
No. The price is what the market pays today (1,590 KRW); the fair value is what the company's own numbers justify (580.29 KRW). For Y-Optics Manufacture Co. Ltd the two are 1,010 KRW per share apart. That gap is exactly why we show both numbers side by side.
How much is Y-Optics Manufacture Co. Ltd worth?
The market values Y-Optics Manufacture Co. Ltd at about 61.6B KRW (market capitalisation, as of Nov 9, 2026). Per share that is 1,590 KRW; our models calculate a fair value of 580.29 KRW per share.
What do the bullish and bearish scenarios say about 066430?
Our models span a range for Y-Optics Manufacture Co. Ltd: cautious scenario 406.20 KRW, base 580.29 KRW, optimistic 754.38 KRW per share (as of Nov 9, 2026, price 1,590 KRW). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of 066430?
Y-Optics Manufacture Co. Ltd trades at a price-to-earnings ratio of 77.5 (as of Nov 9, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of 580.29 KRW is built from several models across several years. Median P/E at fiscal year-end, 5 fiscal years (2020 to 2025), reported earnings: 39.8. Other multiples: P/B 1.4, P/S 2.1, EV/EBITDA 47.4.
How solid is the balance sheet of Y-Optics Manufacture Co. Ltd (066430)?
Balance-sheet figures for Y-Optics Manufacture Co. Ltd (as of Nov 9, 2026): return on equity 7.5%. They feed the Quality Score of 49/100, which measures business quality independently of the share price.
How far is 066430 from its 52-week high?
Y-Optics Manufacture Co. Ltd trades at 1,590 KRW, about 63% below its 52-week high of 4,295 KRW and 55% above the low of 1,025 KRW (as of Nov 6, 2026). Distance from the high says nothing about value: that is what the fair value of 580.29 KRW is for.
Which stocks are comparable to Y-Optics Manufacture Co. Ltd?
From the same area (Basic Materials) we also value Linde plc, Ecolab Inc, The Sherwin-Williams Company, Nan Ya Plastics Corporation, 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 Y-Optics Manufacture Co. Ltd stock attractive at the current price?
The data as of Nov 9, 2026: price 1,590 KRW, calculated fair value 580.29 KRW (−64%), Quality Score 49/100, from 14 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 066430 calculated?
We run Y-Optics Manufacture Co. Ltd through 14 models from 5 families: Earnings-Based, Multiples, Asset-Based, Economic Profit, Growth Earnings. Every model gets the same audited fundamentals; the fair value of 580.29 KRW 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 13.3% above its aggregate fair value. Y-Optics Manufacture 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 Y-Optics Manufacture Co. Ltd (066430)?
The closing price on Nov 6, 2026 was 1,590 KRW. Our model-based fair value is 580.29 KRW, about 64% lower (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Y-Optics Manufacture Co. Ltd right now?
The price sits above even our optimistic bull case (754.38 KRW). The favourable scenario is already priced in. Weak quality (49/100) and above fair value at the same time, the margin of safety is missing on both counts. A fairly wide model range (406.20 KRW to 754.38 KRW) leaves room in how you read the outcome.
Key figures of Y-Optics Manufacture Co. Ltd
How large is the market capitalisation of Y-Optics Manufacture Co. Ltd (066430)?
The market capitalisation of Y-Optics Manufacture Co. Ltd is 61.6B KRW (≈ $45.6M). 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 Y-Optics Manufacture Co. Ltd (066430)?
The price-to-sales ratio of Y-Optics Manufacture Co. Ltd is 3.62 (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 Y-Optics Manufacture Co. Ltd (066430)?
Earnings per share at Y-Optics Manufacture Co. Ltd are 24.49 KRW (price ÷ EPS = P/E 77.5). Earnings per share over the last twelve months: total profit spread across every single share.
What is the net margin of Y-Optics Manufacture Co. Ltd (066430)?
The net margin of Y-Optics Manufacture Co. Ltd is 4.7% (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 Y-Optics Manufacture Co. Ltd (066430)?
The return on equity (ROE) of Y-Optics Manufacture Co. Ltd is 7.5% (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 Y-Optics Manufacture Co. Ltd (066430)?
On an EBIT basis the return on assets of Y-Optics Manufacture Co. Ltd is 0.8% (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 Y-Optics Manufacture Co. Ltd (066430)?
The operating margin of Y-Optics Manufacture Co. Ltd is 1.9% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Y-Optics Manufacture Co. Ltd (066430)?
Revenue at Y-Optics Manufacture Co. Ltd is growing −3.5% versus a year earlier (3y avg −0.9%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How much free cash flow does Y-Optics Manufacture Co. Ltd (066430) generate?
The free cash flow of Y-Optics Manufacture Co. Ltd is −3.0B KRW (fiscal year 2025). The cash truly left after running and investing in the business, this is what pays dividends and buybacks.
How much net debt does Y-Optics Manufacture Co. Ltd (066430) carry?
The net debt of Y-Optics Manufacture Co. Ltd is 1.4B KRW (fiscal year 2025). Debt minus cash on hand. The note shows how many years of free cash flow could in theory pay it off.
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Nov 9, 2026