Price-to-Free-Cash-Flow

Price-to-free-cash-flow divides market cap by annual free cash flow — the multiple paid for each dollar of cash the business actually throws off after capex. It is P/E's harder-nosed sibling: earnings are an accounting opinion, while free cash flow is what is available to fund dividends, buybacks, and debt paydown.

The comparison against P/E is itself a signal. A company at 15x earnings but 35x free cash flow is converting profit to cash poorly — heavy capex, ballooning receivables, or aggressive revenue recognition — and that gap is one of the oldest earnings-quality checks in the book. When the two multiples are close, the earnings are largely cash.

FCF is lumpier than earnings, which is the multiple's practical weakness. A single big capex year or a working-capital swing can double or halve it, so screens typically use a multi-year average rather than one year's print. It also breaks for banks, where "capex" is not the constraint on distributable cash.