Stock screener: find quality stocks in 5 minutes
2026-06-22 · By Lubin Danilo, founder of Lubin Investment
The Lubin screener reviews 5,000 stocks on 10 quality criteria and assigns a score from 0 to 10. Enter a ticker, read the score and the price-to-free-cash-flow ratio: in under five minutes you identify financially sound companies at a reasonable price, with no account required.
- The Lubin screener analyses over 5,000 global stocks for free across 10 quality criteria.
- Each stock receives a score from 0 to 10; a perfect score combined with a reasonable price-to-free-cash-flow ratio flags a strong candidate.
- The research takes under five minutes: enter the ticker, read the score and the criteria breakdown.
- QLYS (cybersecurity), KNSL (insurance) and MA (payments) all earn a perfect score with very different valuations.
- No sign-up required; the screener covers US, European and Asian markets.
Why a quality screener rather than a classic one?
Most screeners filter on price or market cap. The Lubin screener starts from a different premise: a cheap stock in a mediocre business is still a bad investment. Each stock is scored on fundamental criteria — profitability, balance-sheet strength, earnings consistency — before the valuation is examined.
The 10 criteria analysed
- Revenue growth over 5 years
- Earnings consistency (no losses over the period)
- Net margin and its trend
- Return on equity (ROE)
- Return on assets (ROA)
- Positive free cash flow generation
- Debt level relative to equity
- Interest coverage by operating income
- Balance-sheet strength (equity-to-assets ratio)
- Absence of excessive shareholder dilution
How to use it: five minutes for a first analysis
Go to the Lubin screener. No account needed. Type the ticker into the search bar. The screener instantly displays the overall score out of 10, followed by the breakdown across all ten criteria. If the score is perfect, look at the price-to-free-cash-flow ratio to assess valuation.
Three real examples from the screener
| Company | Sector | Quality score | Price-to-free-cash-flow ratio |
|---|---|---|---|
| QLYS – Qualys | Cybersecurity | Perfect (10/10) | 18× |
| KNSL – Kinsale Capital | Specialty insurance | Perfect (10/10) | 7× |
| MA – Mastercard | Payments | Perfect (10/10) | 23× |
Qualys is valued at 18 times its free cash flow — reasonable for a recurring cybersecurity business. Kinsale Capital is valued at just 7 times, exceptionally low for a high-growth specialty insurer. Mastercard is valued at 23 times, reflecting the durability of its network model.
Markets covered: US, Europe, Asia
The screener covers the major European exchanges (Paris, Amsterdam, Frankfurt, London) and Asian ones (Tokyo, Hong Kong, Seoul). The same ten criteria apply regardless of where a stock is listed.
What the screener does not replace
A perfect score is a starting signal, not a buy recommendation. Use the screener to build a short list of candidates, then do deeper research on each before making a decision.
FAQ
Is the Lubin screener really free?
Yes, entirely. No account is required. Full access to the ten detailed criteria is free and unlimited.
What is the difference between the quality score and the price-to-free-cash-flow ratio?
The quality score measures fundamental strength. The price-to-free-cash-flow ratio measures how much you pay for that quality. Both pieces of information are necessary.
How many stocks does the screener cover?
Over 5,000 stocks listed on the major global exchanges: United States, Europe and Asia.
Does a perfect score guarantee a good investment?
No. A perfect score means the company excelled across all ten criteria over the historical period. It does not guarantee future performance.
Can I use the screener for European stocks like LVMH or ASML?
Yes. The screener analyses European stocks using the same criteria as US stocks.
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About the author
Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I have analyzed stocks through their fundamentals for several years and invest my own money with this method. I codified it into a tool that judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).