Data, not gut feeling.
We scale 7 metrics (PER, PBR, ROE and more) to a 100-point score to analyze undervalued quality stocks every day. Not a black box — a transparent screener that shows its reasoning.
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Why Owl Labs
We don't "guarantee returns." Instead we give you a rigorous method, transparent evidence, and tools to verify it yourself.
Composite 7-metric score
PER, PBR, ROE, operating margin, EV/EBITDA, dividend yield and interest (volume), weighted to 100 points. Not one or two metrics — the whole fundamental picture.
Safety filter first
Only stocks that pass basic health checks (positive operating income, debt ratio, current ratio) get an A–D grade. We screen out the fragile ones first.
Not a black box
We show which metrics feed the score and how. Check the evidence for "why this grade" yourself.
Trustworthy data
Auto-collected and refreshed daily from DART, Yahoo Finance and Naver Finance. Only public data with a clear source.
Designed against overconfidence
We never give a perfect 100 (cap ~98), cap the score when data is thin, and dock points for disclosure risks (embezzlement, delisting, etc.).
Backtest it yourself
Run "what if I had bought this in the past?" with the PRO backtest. We don't ask you to trust the numbers — we give you the tool to check them.
5 value strategies — a second check by the masters' standards
Independently of the 100-point score, we quantify 5 proven value-investing methods and apply them to every stock daily. The screener's N/5 passed chip is this result (hover the chip to see the formula). Passing 3+ is solid.
Benjamin Graham
PER×PBR ≤ 22.5 + positive EPS + debt ratio ≤ 200% — the margin-of-safety formula from The Intelligent Investor.
Magic Formula (Greenblatt)
Rank by earnings yield (EBIT/EV) and return on capital (ROC), then sum the ranks — top 30% pass.
Prasad (durable high ROE)
ROE ≥ 12% held over multiple years + debt ratio ≤ 70% + positive operating cash flow.
Simple DCF
Discounted cash flow on conservative assumptions (5% growth, 10% discount) — passes only if intrinsic value ≥ 1.2× market cap.
Damodaran (relative value)
Must have lower PER/PBR and higher ROE than the sector median — reflecting industry characteristics.
Explicit approximation notice
Where data is limited (EBIT≈operating income, FCF≈operating cash flow×0.8, etc.) we flag it as an approximation — no hiding.
🆕 Recent updates (July 2026)
- · 🧮 Quantified 5 value strategies + screener formula tooltips
- · 🌏 Global dashboard — indices, heatmap, today's picks & guru moves on one screen (light/dark)
- · 🎩 Guru 13F — latest-quarter portfolios of Buffett, Dalio, Ackman & more
- · 📬 5 Telegram alerts — target price, grade changes, morning brief, signals, watchlist news
- · ⭐ One-click 🔔 add-to-watchlist on the screener + unified stock/feature search
- · 🦉 Owl assistant — add to watchlist, summarize news, check the 5 strategies, all on real data
How to use it (web & mobile)
Log in in 3 seconds
Sign up and log in at once with Google — no password.
Find undervalued stocks in the screener
All US & Korean stocks by grade and score. Filter by market and grade.
Watchlist + target alerts
Save to your watchlist, set a target return / buy price, and get a Telegram ping.
Ask the Owl assistant (PRO)
Ask by voice like "How's Apple?" and it reads the analysis back to you.
Where you can do what
Each channel has its own role.
💬 KakaoTalk bot
Quick lookups · reach
- · Stock analysis (PER/PBR/ROE/grade)
- · Index / FX / crypto quotes
- · Today's top picks
- · Sector & dividend picks (subscription)
✈️ Telegram
Real-time alerts · PRO
- · Target return / buy-price hit alerts
- · Golden/death-cross signals
- · New listing & inclusion alerts
- · Daily morning briefing
💻 Website
Deep analysis · tools
- · Full grade/score ranking
- · Charts + technical signals + fair value
- · Backtest (PRO)
- · 🦉 Owl voice assistant (PRO)
Being honest with you
This service is information for reference only, not a buy/sell recommendation or a guarantee of returns. Analysis and backtests based on past data do not guarantee future results. All investment decisions and their consequences are your own. Grades and scores are relative screening indicators of "undervalued/quality," not personalized investment advice.