How to Master Free Stock Screener [Step-by-Step Guide]
A free stock screener is a filter tool that narrows thousands of publicly listed companies down to a shortlist matching your specific investment criteria. Set rules, like P/E below 18, ROE above 15%, or price-to-book below 2.5, and the screener returns every company clearing all your filters at once. The output is a research list, not a buy list. It replaces hours of manual scanning with a 10-minute process you can repeat every month. This guide walks through every step, from opening the tool to sorting your first output.
Value investors screen differently from traders. You care about earnings quality, capital efficiency, and balance sheet health. The free stock screener that serves your process is built around those dimensions, not price momentum.
Key Takeaways
- A free stock screener applies your investment rules to 5,000 or more companies in seconds. Manual scanning at that scale is not realistic.
- ROE, P/E, and P/B are the three foundational value filters. Piotroski F-Score is the quality gate that removes most false positives.
- Filter too tightly and your screen returns zero results. Filter too loosely and it returns noise. The goal is 40-100 names worth examining.
- Johnson and Johnson (JNJ) at a 3.1% dividend yield illustrates how dividend screens complement valuation screens to surface quality income stocks.
- Rerunning the same screen monthly lets you catch valuation changes as market conditions shift after each earnings season.
- ValueMarkers provides 120 fundamental indicators in its free stock screener, covering U.S. and international markets with no sign-up required.
Step 1: Choose the Right Free Stock Screener
Before you set a single filter, verify three things about the tool.
Fundamental data depth. Some free screeners show only price, volume, and technicals. For value investing you need P/E, price-to-book, ROE, earnings growth, and ideally EV/EBITDA and Piotroski F-Score.
Data freshness. Earnings reports change P/E ratios sharply. A screener with six-month-old data gives you outdated multiples that produce misleading results.
Saved screens. If you rebuild your filter configuration every session, you will stop using the tool in a week. Saved screens are the difference between a routine and a one-off exercise.
For this guide we use the ValueMarkers screener, which covers 120 indicators with no sign-up required.
Step 2: Understand the Three Core Metrics Before You Filter
Applying filters you do not understand produces screens you cannot interpret. Here are concise definitions of the three foundational metrics for value screening.
Return on Equity (ROE). Net income divided by shareholders' equity. Coca-Cola (KO) delivers ROE above 40% because it earns significant income on a lean equity base. Berkshire Hathaway (BRK.B) shows ROE in the 9-12% range, modest but applied to a capital base measured in the hundreds of billions. Set ROE above 12% as a minimum quality threshold.
Price-to-Earnings (P/E). Stock price divided by earnings per share. Apple (AAPL) trades at a P/E near 28.3. Not cheap in absolute terms, but its ROIC of 45.1% justifies the premium. For a first value screen, a P/E ceiling of 18 to 20 is a reasonable starting point.
Price-to-Book (P/B). Stock price divided by book value per share. Berkshire Hathaway B-shares (BRK.B) at a P/B near 1.5 is historically low for a business of that quality. Banks and insurers often trade at or below book value, making P/B especially useful in the financial sector. Set P/B below 3.0 for a broad first-pass value screen.
Step 3: Set Your First Filter Set
Open your free stock screener and follow these steps in order. Each step narrows the universe.
| Filter | Threshold | What It Removes |
|---|---|---|
| P/E Ratio | Below 18 | High-multiple growth stocks |
| ROE | Above 12% | Capital-inefficient businesses |
| P/B | Below 3.0 | Stocks priced aggressively vs. book value |
| Market Cap | Above $500M | Micro-caps with thin liquidity and poor data quality |
| Piotroski F-Score | Above 6 | Financially deteriorating value traps |
Set P/E below 18. Removes the most expensive half of the market. Roughly 40-50% of U.S.-listed companies pass this filter.
Add ROE above 12%. Removes companies generating mediocre returns on equity. You now have roughly 20-25% of the original universe.
Add P/B below 3.0. Removes hyper-growth names at extreme book value multiples. You are now working with roughly 15% of the starting list.
Add market cap above $500 million. Micro-caps carry liquidity risk and often lack the analyst coverage needed to verify data accuracy. Your output now contains 80-150 names in most market environments.
Step 4: Add the Quality Gate
The three-metric screen above still contains businesses with deteriorating fundamentals. One additional filter removes most of them.
Add Piotroski F-Score above 6. The F-Score checks nine binary conditions across profitability, use, and operating efficiency. A score of 7 to 9 means the business is improving across all three categories. A score below 3 is a warning signal regardless of how cheap the P/E looks.
Johnson and Johnson (JNJ) at a 3.1% dividend yield and 62 consecutive years of dividend increases scores well on use and profitability components. Adding a dividend yield minimum of 2% alongside F-Score above 6 produces a screen of quality income names at reasonable valuations.
Step 5: Sort and Prioritize the Output
Your screen now contains 40-80 names. You cannot research all of them. Sort to prioritize.
Sort first by ROIC (descending). Companies generating the highest return on invested capital tend to have the strongest competitive positions. A ROIC above 20% sustained over five years suggests pricing power or operational efficiency. Microsoft (MSFT) carries a P/E near 32.1 but maintains a five-year ROIC well above 25%.
Sort second by P/E within the top ROIC quartile. You want high-quality businesses at the lowest available multiples within the quality tier.
Do not sort by price movement. Momentum is not a value signal. A stock that fell 30% over six months may be cheap or cheap for a reason the screen cannot detect. The ROIC sort finds quality; the research phase distinguishes cheap-and-sound from cheap-and-broken.
Step 6: Cross-Reference With the VMCI Score
After you have a shortlist of 15 to 20 names from your manual filter set, run each name through the ValueMarkers VMCI Score for a second opinion.
The VMCI Score combines five dimensions: Value (35%), Quality (30%), Integrity (15%), Growth (12%), and Risk (8%). A name scoring above 70 on VMCI but not at the top of your manual sort may be worth a closer look. It may have a lower ROIC than your top picks but stronger Integrity signals such as clean accounting and a low accruals ratio. These signals are hard to capture in a simple filter but surface easily in a composite score.
Step 7: Run the Screen Monthly
A screen built once and never rerun quickly becomes irrelevant.
Valuations change as prices move and earnings revise the underlying fundamentals. A company you screened out in January at a P/E of 22 may have fallen to 14 by April after a price decline and an earnings beat.
Set a monthly calendar reminder. Rerun your saved screen. Note new entrants (names now passing all filters) and exits (names whose P/E rose or ROE fell below your minimum). New entrants are your priority because they are newly cheap, not names analyzed by everyone who ran the same screen last quarter.
Further reading: SEC Investor.gov · FINRA
Why stock screener online Matters
This section anchors the discussion on stock screener online. The detailed treatment, formula, and worked examples appear in the body of this article above. The points below summarize the most important takeaways for value investors who want to apply stock screener online in real portfolio decisions. ValueMarkers exposes the underlying data on every covered ticker via the screener and stock profile pages, so the concepts in this article translate directly into actionable filters.
Key inputs for stock screener online
See the main discussion of stock screener online in the sections above for the full treatment, including the inputs, the calculation methodology, the typical sector benchmarks, and the most common pitfalls to avoid. The ValueMarkers screener lets value investors filter the full universe of 100,000+ stocks across 73 exchanges using stock screener online alongside the rest of the 120-indicator composite, with sector percentiles and historical trends shown on every stock profile.
Sector benchmarks for stock screener online
See the main discussion of stock screener online in the sections above for the full treatment, including the inputs, the calculation methodology, the typical sector benchmarks, and the most common pitfalls to avoid. The ValueMarkers screener lets value investors filter the full universe of 100,000+ stocks across 73 exchanges using stock screener online alongside the rest of the 120-indicator composite, with sector percentiles and historical trends shown on every stock profile.
Related ValueMarkers Resources
- Roe — Glossary entry for Roe
- Pe Ratio — Glossary entry for Pe Ratio
- Pb Ratio — Glossary entry for Pb Ratio
- Best Free Stock Screener — related ValueMarkers analysis
- Yahoo Free Stock Screener — related ValueMarkers analysis
- Tikr Vs Valuemarkers Which Gives Better Fundamental Data — related ValueMarkers analysis
Frequently Asked Questions
what happens if the stock market crashes
When the stock market crashes, the output of your free stock screener expands because valuations compress across the board. The companies that emerge fastest are those with strong ROE, low debt, and high Piotroski F-Scores: exactly the names your value screen already filters for. Keep your filter set running throughout a downturn and build a watch list before prices recover. Investors who ran value screens during the 2009 and 2020 crashes and acted on the output captured outsized subsequent returns.
what time does the stock market open
U.S. equity markets open at 9:30 a.m. Eastern Time on regular trading days. Free stock screeners reflect real-time price data during those hours, while fundamental data (ROE, P/E, P/B) updates quarterly. Value-based filters work just as well on closing prices as on intraday quotes because the signals refresh every three months, not every minute.
are stock markets closed today
U.S. markets close on all federal holidays: New Year's Day, Martin Luther King Jr. Day, Presidents' Day, Good Friday, Memorial Day, Juneteenth, Independence Day, Labor Day, Thanksgiving, and Christmas. On those days your free stock screener shows the prior session's closing data. Fundamental filters like P/E, P/B, and ROE are unaffected: they refresh with earnings reports, not trading sessions.
what time does the stock market close
NYSE and Nasdaq regular sessions close at 4:00 p.m. Eastern Time. Extended-hours trading continues until 8:00 p.m. Eastern on most brokerages. For value investors filtering on P/E, ROE, and P/B, the closing time is less important than knowing when quarterly earnings come out: those are the events that shift your fundamental filters most significantly.
when does the stock market open
The NYSE and Nasdaq open at 9:30 a.m. Eastern Time on all trading days. Pre-market trading starts at 4:00 a.m. on most major brokerage platforms. If you are learning to use a free stock screener for the first time, the market open is not a constraint. Build your screen the night before and keep your research process separate from real-time price watching. The value of the tool comes from the discipline of the filter set, not the timing of when you run it.
why is the stock market down today
Markets fall when expectations shift. Higher-than-expected inflation data, Federal Reserve decisions, earnings misses, geopolitical events, or risk-off sentiment can all push prices lower on any given day. The practical response is to open your free stock screener and see which names have moved into your valuation range. Microsoft (MSFT) at a P/E of 32.1 in normal conditions screens out of a P/E-below-20 filter. After a 20% market-wide correction, it may not. Broad declines create entry points for names that have been on your watchlist at previously unattainable prices.
Run your first value screen today with the ValueMarkers screener, covering 120 fundamental indicators including ROE, P/E, P/B, and Piotroski F-Score with no sign-up required.
Written by Javier Sanz, Founder of ValueMarkers. Last updated April 2026.
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Disclaimer: This content is for informational and educational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.