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Deep dives into legendary investor strategies, screening methodology, and market analysis.

Stock screener app view on GuruScreens showing the Magic Formula thresholds for earnings yield and return on invested capital with 8 of 3,787 stocks passing

Product Guide2026-08-1922 min read

Stock Screener App: What the Blanks Hide

Stock screener app results hide the companies with a missing input. Across 3,787 US stocks, blank inputs removed 594 names from a single screen.

Value stock screener library on GuruScreens showing the Acquirers Multiple and Buffett Quality screens with their criteria tags and pass counts of 75 and 16, above the Defensive Investor and Enterprising Investor screens

Strategy Guide2026-08-1921 min read

Value Stock Screener: Eight Definitions, 238 Stocks

Value stock screener results depend on which definition of value the tool encodes. Eight screens over 3,787 US stocks returned 238 names, 217 just once.

Stock screener criteria panel on GuruScreens showing five screening rules with their computed metrics and thresholds, 16 stocks passing out of 3,787 evaluated

Strategy Guide2026-08-1718 min read

Stock Screener: Which Rule Eliminated Every Stock

Stock screener results hide the one fact that matters: which rule did the eliminating. Here is that breakdown for eight value screens over 3,787 companies.

GuruScreens Benjamin Graham Defensive screen showing screening criteria and passing stocks with pass and fail scores

Strategy Guide2026-04-012 min read

Benjamin Graham Defensive Strategy: The Conservative Screen Explained

Benjamin Graham's defensive screen identifies the safest value stocks for conservative investors. Learn the 7 criteria and see which stocks pass today.

GuruScreens Magic Formula screen showing earnings yield and ROIC criteria and passing stocks

Strategy Guide2026-03-282 min read

Magic Formula Investing: How Greenblatt's Strategy Works [2026]

Joel Greenblatt's Magic Formula ranks stocks by earnings yield and return on capital. Learn the methodology and see current results.

GuruScreens value screen showing pass and fail screening criteria and qualifying stocks

Strategy Guide2026-03-251 min read

Piotroski F-Score: The 9-Point Checklist for Value Stocks

The Piotroski F-Score evaluates financial strength on a 9-point scale. Learn how each criterion works and which stocks score highest.

GuruScreens Warren Buffett Quality screen with per-criterion audit and passing stocks

Comparison2026-03-201 min read

GuruFocus Alternative: Same Guru Screens, 80% Cheaper

Looking for a GuruFocus alternative? GuruScreens offers the same legendary investor screens with full transparency at a fraction of the price.

GuruScreens stock screening strategies showing one-year returns, drawdown and equity curves for each guru screen

Comparison2026-03-151 min read

Best Guru Stock Screener: Compare Tools for Value Investors [2026]

Comparing the top guru stock screeners — GuruFocus, Validea, AAII, and GuruScreens. Features, pricing, and which one fits your needs.