Free Cash Flow (FCF).

Free cash flow (FCF) is the cash a company generates from its operations after paying for the capital expenditures required to maintain and expand its asset base. The most common calculation subtracts capital expenditures from operating cash flow as reported on the cash flow statement. Unlike net income, which is shaped by accrual accounting conventions, depreciation schedules, and non-cash charges, free cash flow represents money that has actually entered the business and is available to be deployed — paying down debt, funding acquisitions, buying back shares, paying dividends, or accumulating on the balance sheet. Warren Buffett has long argued that businesses should be evaluated on the cash they can distribute to owners over their lifetimes, making free cash flow the closest proxy for that concept in standard financial reporting. Companies with high and growing FCF enjoy strategic flexibility: they can self-fund growth without diluting shareholders or taking on debt, and they are less vulnerable to credit market disruptions. Conversely, businesses that consistently report accounting profits but generate little or no FCF are often funding operations through working capital deterioration, aggressive revenue recognition, or deferred maintenance — patterns that eventually surface as cash crunches or earnings restatements. Investors compare a company's FCF yield (FCF divided by market cap or enterprise value) to Treasury yields and peer multiples as a simple gauge of whether the stock is cheap or expensive relative to the cash it actually produces. The metric has limitations: heavy investment periods, where a company is deliberately spending on capacity or new markets, can temporarily depress FCF below true earning power. Distinguishing between transitory and structural FCF weakness requires reading the capital allocation narrative alongside the numbers.