Value strategy
Graham Number
A one-line valuation ceiling — √(22.5 × EPS × Book Value per share) — buy comfortably below it, ignore it above it.
1–3 years, or as an ongoing valuation sanity checkBeginner–Intermediate
Benjamin Graham — derived from the P/E and P/B limits in “The Intelligent Investor” (1949, rev. 1973), Chapter 14