The Credit Cycle — The Engine Behind Every Major Market Move

Ask what caused any major financial crisis — 1987, 1997, 2000, 2008 — and at the bottom of the answer is the same phenomenon: the credit cycle. Credit expands beyond what fundamentals support; it contracts sharply; assets priced on easy credit conditions collapse. Understanding the credit cycle is the most important macro skill for serious investors.

Why This Matters

Howard Marks's writing on market cycles is the most accessible and practical treatment of the subject in investment literature. His observation that markets are driven by the credit cycle — by the expansion and contraction of the willingness and ability to lend and borrow — provides a framework that explains both the amplitude of financial cycles and the predictability of their direction, if not their timing. The credit cycle is not simply a reflection of the economic cycle — it is frequently its driver. When credit is easy, asset prices rise and economic activity expands, even if underlying fundamentals do not fully justify the expansion. When credit tightens, the opposite occurs, often sharply. The credit cycle's amplitude — how high optimism rises and how low pessimism falls — is a function of human psychology: the same biases of overconfidence and herding that affect individual investors operate at the systemic level, producing collective credit expansion in good times and collective credit contraction in bad times.