Value Investing Methodology: Buffett, Lynch, and Core Financial Statement Analysis Metrics
Value investing’s core idea: buy assets below intrinsic value, profit when price returns to intrinsic value. But estimating “intrinsic value” is the hardest part — it requires deep analysis of business operations, competitive advantages, financial condition, and future cash flows, not just historical price trends.
Core Financial Metric Interpretation
P/E Ratio (Price-to-Earnings): stock price ÷ earnings per share, reflecting how much investors will pay per unit of earnings. High P/E may indicate high future growth expectations (growth stocks) or overvaluation; low P/E may indicate undervaluation or earnings concerns. P/E varies enormously across industries (tech growth stocks typically 30–50x+, utilities 15–20x) — cross-industry comparisons are meaningless.
Free Cash Flow (FCF): operating cash flow minus capital expenditures. One of Buffett’s most valued metrics, harder to manipulate through accounting than net income. Companies consistently generating large FCF (Apple, Microsoft) typically have strong competitive moats.
Return on Equity (ROE): net income ÷ shareholders’ equity, measuring efficiency of using shareholders’ capital to generate profit. Buffett long preferred companies with ROE consistently above 15% (needs analysis alongside use — high debt can artificially inflate ROE).
Peter Lynch’s Growth Stock Approach
Peter Lynch (managing Fidelity Magellan Fund 1977–1990) achieved approximately 29% annualized returns — one of the best-documented fund managers. His approach emphasizes “invest in what you know” and the PEG ratio (P/E ÷ earnings growth rate), with PEG < 1 typically treated as a potential undervaluation signal. Lynch's One Up on Wall Street is a classic value investing read.
