When you strip the noise away, the real question is simple: the bid-ask spread is a market maker's compensation for providing immediacy. Mechanism: Spreads are wider when uncertainty is high, when the asset is illiquid, or when the market maker suspects adverse selection. Understanding spread dynamics helps you time executions and choose between aggressive and patient order types. Market translation: Right before earnings, spreads on single-name options widen because the market maker is uncertain about the magnitude of the move. Failure mode: The mistake is crossing the spread aggressively on every trade without considering whether the urgency is real. Review question: Before sizing up, identify whether the edge comes from cash flow, volatility, timing or balance-sheet structure. That is the kind of small conceptual habit that compounds into better decisions over time.