Operating margin

Operating margin divides operating profit (EBIT) by revenue, capturing profitability after both COGS and operating expenses (sales, marketing, R&D, G&A). It is the workhorse profitability metric because it is leverage-neutral and tax-neutral, making cross-firm and cross-jurisdiction comparisons honest. Operating-margin expansion is the single most common driver of multi-year stock outperformance, because a 200-basis-point margin expansion on a flat-revenue business produces double-digit EPS growth without any top-line acceleration. We track operating-margin trends against three benchmarks: the company's own five-year average (mean reversion), the peer-cohort median (relative competitive positioning), and management's stated long-term target (gap to plan). We are particularly attentive to the divergence between gross-margin and operating-margin trends: if gross margin is steady but operating margin is declining, the issue is operating-expense management; if both are declining, the issue is unit economics, which is structurally harder to fix.