What Makes a Stock a Piotroski F-Score Stocks constituent?
The Piotroski F-Score screen identifies fundamentally improving value stocks by requiring an F-Score of 8 or higher, a P/B ratio under 2.0, and a market cap exceeding $500M. This rigorous filter helped investors avoid the 2008 collapse of companies like Lehman Brothers by flagging deteriorating balance sheets before they hit zero.
Filter for Value Anchors
We start with P/B <= 2 to isolate undervalued assets, similar to how Warren Buffett bought American Express in 1964 when it traded at a deep discount following the Salad Oil Scandal.
Verify Financial Health
The F-Score >= 8 filter ensures profitability and liquidity are rising, which would have flagged the 2016 turnaround of Microsoft as it shifted focus to high-margin Azure cloud services.
Exclude Micro-cap Noise
A $500M market cap floor removes volatile penny stocks, ensuring the data quality is as reliable as the institutional-grade reporting seen in companies like Ford during its 2021 recovery.