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KOYJ Co. Ltd (121850) fair value: what the stock is really worth

As of Sep 11, 2026: fair value of KOYJ Co. Ltd KRW 90, price KRW 135, upside -33.2%, quality 32 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.

  1. Fair value above price? No
  2. Good quality? No
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Basic Materials · KR · ISIN KR7121850002

KC Thin data Sep 27, 2026

KOYJ Co. Ltd

121850 · KQ

Weak valuationQuality is weak on top of the rich price.

!Fair value 90.15 KRW · Overvalued (−33.2%)
!Quality 32/100
!Weak Growth (revenue 5y −19.3 %/yr)
!Loss-making · -63.7% net margin (TTM)
!High debt · negative free cash flow
!Trails peers (1/8)
!Narrow moat 11/100
!Evidence only low, so the estimate is less certain
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26 valuation models 8 families, DCF to NCAV 37 quality factors margins, balance sheet, cashflow, debt 6 AI factors moat, what no ratio measures 2,000+ data points verified, per stock, median

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Price vs Fair Value

66,547 KRW 135.00 KRW Fair Value 90.15 KRW Mar 2021 Sep 2026

White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 27, 2026.

How to read this chart

60‑month range 135.00 KRW – 66,547 KRW · fair‑value band 67.27 KRW – 134.54 KRW · the 135.00 KRW price screens above the 90.15 KRW fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). Dashed = 300-day average. As of Sep 27, 2026.

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Company profile

KOYJ Co., Ltd. manufactures and sells composite optical films and materials in South Korea.

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KOYJ Co., Ltd. manufactures and sells composite optical films and materials in South Korea. It offers liquid crystal protection films and backlight components; chemi-tronics products, such as silicone materials, nano metal-oxide, and semiconductor/display products; and 3D smart casting solutions, including ceramic mold sandcasts, 3D smart mold conformal cooling systems, and bottle product parts, as well as engages in 3D precision processing activities. The company was founded in 2006 and is headquartered in Chungju-si, South Korea.

Stock analysis

KOYJ Co. Ltd (121850) currently trades at 135.00 KRW, while our model-based Fair Value estimate is 90.15 KRW, 33.2% below the price, so the stock looks overvalued today.

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Valuation

How firm this estimate is: it rests on 1 models at a data quality of 95/100, which puts the evidence level at low.

Scenario range: 67.27 KRW (bear) to 134.54 KRW (bull), the price of 135.00 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 32/100 (below-average quality), in the Basic Materials sector.

Weak Growth: Revenue growth is inconsistent: the periods point in different directions, so there is no trend to rely on.

KOYJ Co. Ltd reported revenue of 12.7B KRW in FY2025 versus 16.2B KRW in FY2021, a compound −6.0%/yr. Reported net income was −11.0B KRW in FY2025.

Key figures

Market cap 7.4B KRW (≈ $5.5M) · P/S ratio 0.55 · Net margin −87.3% · Return on equity −95.5% · Return on assets (EBIT) −25.8% · Operating margin 0.0% · Revenue (TTM) 13.6B KRW · Revenue growth (YoY) +22.2%.

Competitive moat

Our AI-assisted moat analysis scores the competitive advantage at 28 out of 100 (medium confidence).

What moves the price

The share trades about 98% below its 52-week high and at its 52-week low.

For context, the median of 10 Basic Materials peers we cover trades at −24% fair-value upside, at −33%, 121850 screens richer than that median.

Fair Value models

Bear 67.27 KRW Fair Value 90.15 KRW Bull 134.54 KRW
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. 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. 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.
Highest evidence
NCAV (Graham) 118.46 KRW 158.74 KRW 236.92 KRW 54
All 1 models by family
Asset-Based
NCAV (Graham) 118.46 KRW 158.74 KRW 236.92 KRW 54

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Quality Score breakdown

Overall quality 32/100

Of which business quality 29 · Market factors (momentum, volatility) 17

Profitability 8
Margins and returns on capital today
Quality Growth 0
Are margins and returns improving?
Cashflow 3
Earnings quality: real cash, not paper profit
Fin. Strength 12
Balance sheet, leverage, solvency risk
Investment 100
Disciplined investing over empire-building
Low Volatility 46
Calm price path (market factor)
Momentum 8
Price trend over the last 3–12 months (market factor)
52W Momentum 0
Distance to the 52-week high (market factor)
Net Issuance 100
Share count: buybacks or dilution?

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Revenue & earnings trend

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. 0/100
Revenue growth is inconsistent: the periods point in different directions, so there is no trend to rely on.
Revenue growth 1 year
−39.0%
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.
+9.2%
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.
−19.3%
Start year 2020 (pandemic). Over 10 years: −7.0% a year
Revenue growth 13 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.
−7.6%
Profit margin (trend) ⓘ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.
−5.5% (2020) → −63.8% (2025)
What shareholders gained per year ⓘWe only publish this rate when it is defensible. Reason: fiscal 2025 is a loss year, no rate is defined from a loss
not computed

121850 screens overvalued: fair value 33% below the price. Compare with Ningxia Baofeng Energy Group →

Compare KOYJ 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.Chemicals · 341 stocks

Beats the industry median on 1/7 measures
Overall it trails its industry peers.
Valuation
Quality Score 29 · Bottom 25%
Fair Value upside −33.2% · Below median
Profitability
Return on assets −15.1% · Bottom 25%
Net margin (TTM) −63.7% · Bottom 25%
Operating margin (TTM) 0.0% · Bottom 25%
Growth and dividend
Revenue growth 22.2% · Above median
Balance sheet
Debt / equity 2.96× · Highest 25%

Strength profile in five axes (Snowflake)

VALUEFUTUREPASTHEALTHDIVIDEND
This stock
VALUEFUTUREPASTHEALTHDIVIDEND
Sector peers
VALUE (fair-value potential)0 · sector 2
FUTURE (revenue growth)100 · sector 63
PAST (return on equity)0 · sector 22
HEALTH (low debt)0 · sector 94
DIVIDEND (yield)0 · sector 31

VALUE 0: the price sits above our fair-value range.

Context: sector, industry, market

Values & ESG

Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.

None of the checked exposures detected

Similar stocks

10 more Chemicals stocks, each showing price versus our Fair Value estimate.

Stock Price Fair Value vs Fair Value
Ningxia Baofeng Energy Group 600989 ¥22.33 ¥40.44 +81%
Dow Inc DOW $27.59 $20.98 −24%
Hengli Petrochemical Co 600346 ¥16.15 ¥43.28 +168%
Zangge Mining Company 000408 ¥71.46 ¥78.61 +10%
LG Chem, Ltd 051910 252,500 KRW 587,755 KRW +133%
Zhejiang Juhua Co 600160 ¥33.97 ¥19.25 −43%
Jiangsu Eastern Shenghong Co 000301 ¥13.36 ¥3.06 −77%
Formosa Chemicals & Fibre Corporation 1326 67.00 TWD 17.68 TWD −74%
Syensqo SA SYENS €78.20 €32.87 −58%
PETRONAS Chemicals Group 5183 4.49 MYR 1.51 MYR −66%

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KOYJ Co. Ltd · Fair Value
90.15 KRW −33%Fair Value
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Cite: Fair Value Calculator (2026). "KOYJ Co. Ltd Fair Value". https://www.fairvalue-calculator.com/stock/121850

Frequently asked questions

Is KOYJ Co. Ltd (121850) overvalued or undervalued?
As of Sep 27, 2026, our model estimates a fair value of 90.15 KRW versus the last price from Sep 11, 2026 of 135.00 KRW, about −33% upside (overvalued).
What is the fair value of 121850?
Our model-based fair value for KOYJ Co. Ltd is 90.15 KRW (as of Sep 27, 2026), built from audited fundamentals. Last price (from Sep 11, 2026): 135.00 KRW.
What is the quality score of 121850?
KOYJ Co. Ltd has a Quality Score of 32/100. 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 KOYJ Co. Ltd (121850)?
Our model-based price target is the fair value of 90.15 KRW (as of Sep 27, 2026) from 1 valuation models. Cautious scenario 67.27 KRW, optimistic scenario 134.54 KRW. It is a calculation from audited fundamentals, not an analyst target.
What is the KOYJ Co. Ltd stock forecast for 2026?
Our models put fair value at 90.15 KRW, about −33% upside versus the last price from Sep 11, 2026 of 135.00 KRW (overvalued). Cautious scenario 67.27 KRW, optimistic scenario 134.54 KRW. The calculation is refreshed regularly with new filings.
What is the revenue of KOYJ Co. Ltd (121850)?
KOYJ Co. Ltd reported trailing-twelve-month revenue of about 13.6B KRW (latest available figure, as of Sep 27, 2026).
What is the intrinsic value of KOYJ Co. Ltd (121850)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For KOYJ Co. Ltd it is 90.15 KRW per share (as of Sep 27, 2026), against a price of 135.00 KRW. It is the blended result of 1 valuation models (cash flow, earnings, asset, dividend).
Is KOYJ Co. Ltd stock overvalued or undervalued in 2026?
As of Sep 27, 2026, 121850 trades above its calculated fair value: price 135.00 KRW, fair value 90.15 KRW, a gap of about −33% (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 121850?
No. The price is what the market pays today (135.00 KRW); the fair value is what the company's own numbers justify (90.15 KRW). For KOYJ Co. Ltd the two are 44.85 KRW per share apart. That gap is exactly why we show both numbers side by side.
How much is KOYJ Co. Ltd worth?
The market values KOYJ Co. Ltd at about 7.4B KRW (market capitalisation, as of Sep 27, 2026). Per share that is 135.00 KRW; our models calculate a fair value of 90.15 KRW per share.
What do the bullish and bearish scenarios say about 121850?
Our models span a range for KOYJ Co. Ltd: cautious scenario 67.27 KRW, base 90.15 KRW, optimistic 134.54 KRW per share (as of Sep 27, 2026, price 135.00 KRW). The range comes from different growth and margin assumptions, not from analyst opinions.
How solid is the balance sheet of KOYJ Co. Ltd (121850)?
Balance-sheet figures for KOYJ Co. Ltd (as of Sep 27, 2026): return on equity −95.5%, debt of 2.96 per unit of equity. They feed the Quality Score of 32/100, which measures business quality independently of the share price.
How far is 121850 from its 52-week high?
KOYJ Co. Ltd trades at 135.00 KRW, about 98% below its 52-week high of 7,078 KRW and at the low of 135.00 KRW (as of Sep 11, 2026). Distance from the high says nothing about value: that is what the fair value of 90.15 KRW is for.
Which stocks are comparable to KOYJ Co. Ltd?
From the same area (Basic Materials) we also value Ningxia Baofeng Energy Group, Dow Inc, Hengli Petrochemical Co, Zangge Mining Company, 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 KOYJ Co. Ltd stock attractive at the current price?
The data as of Sep 27, 2026: price 135.00 KRW, calculated fair value 90.15 KRW (−33%), Quality Score 32/100, from 1 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 121850 calculated?
We run KOYJ Co. Ltd through 1 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 90.15 KRW, 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 14.5 % above its aggregate fair value. KOYJ 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 KOYJ Co. Ltd (121850)?
The latest price we hold is from Sep 11, 2026 and stands at 135.00 KRW. Our model-based fair value is 90.15 KRW, about −33% upside (overvalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with KOYJ Co. Ltd right now?
Weak quality (32/100) and above fair value at the same time, the margin of safety is missing on both counts. The large gap to fair value rests on thin data (low evidence): fewer applicable models and a shorter history. Read it with extra caution. A fairly wide model range (67.27 KRW to 134.54 KRW) leaves room in how you read the outcome.

Key figures of KOYJ Co. Ltd

How large is the market capitalisation of KOYJ Co. Ltd (121850)?
The market capitalisation of KOYJ Co. Ltd is 7.4B KRW (≈ $5.5M). 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 KOYJ Co. Ltd (121850)?
The price-to-sales ratio of KOYJ Co. Ltd is 0.55 (last twelve months). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What is the net margin of KOYJ Co. Ltd (121850)?
The net margin of KOYJ Co. Ltd is −87.3% (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 KOYJ Co. Ltd (121850)?
The return on equity (ROE) of KOYJ Co. Ltd is −95.5% (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 KOYJ Co. Ltd (121850)?
On an EBIT basis the return on assets of KOYJ Co. Ltd is −25.8% (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 KOYJ Co. Ltd (121850)?
The operating margin of KOYJ Co. Ltd is 0.0% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at KOYJ Co. Ltd (121850)?
Revenue at KOYJ Co. Ltd is growing +22.2% versus a year earlier (3y avg +9.2%). 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 KOYJ Co. Ltd (121850) generate?
The free cash flow of KOYJ Co. Ltd is −7.3B 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 KOYJ Co. Ltd (121850) carry?
The net debt of KOYJ Co. Ltd is 10.5B 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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