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Foundations

The business cycle

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The business cycle

Economies do not grow in a straight line. They expand, reach a peak, contract into recession, hit a trough, and then expand again. This cycle has repeated for centuries across different countries and different eras. British economist Clement Juglar documented these cycles in the 1860s, and they persist today despite central bank efforts to smooth them. While we cannot predict exactly when peaks and troughs occur, we can learn to recognize the phases and understand what economic indicators signal that a turning point may be near. This chapter maps the business cycle and teaches you how to read it in real time.

Why this matters​

Most investors and policymakers organize their entire strategy around where they believe the economy is in its cycle. If they think expansion is accelerating, they invest in growth stocks, add leverage, and take risks. If they think a peak is near, they move to defensive assets, reduce leverage, and prepare for a downturn. If they expect a trough, they buy what's been beaten down and position for recovery. Getting the cycle phase wrong can be costly—either you miss gains or you suffer losses. Understanding the leading indicators that precede recessions, and the lagging indicators that confirm expansions, is essential for making sense of business news and investment decisions. It's the difference between reading economic news reactively versus anticipating moves months in advance.

What you'll learn​

You'll discover the four phases: expansion (rising output and employment, falling unemployment), peak (the economy at maximum capacity, inflation rising), contraction (declining growth and rising unemployment), and trough (the lowest point before recovery begins, unemployment peaking). You'll learn what characterizes each phase: inflation tends to rise in late expansion as supply constraints bite; unemployment begins rising during contraction with a lag; credit stress peaks near the trough. This chapter covers leading indicators (yield curve, confidence surveys, leading economic index components) that often signal turning points months in advance, and lagging indicators (unemployment, corporate profit margins, average hours worked) that confirm cycles only after they're evident in GDP. You'll see why some indicators are reliable across cycles and others fool you in particular episodes depending on what triggered the downturn.

How to read this chapter​

Start with the definition of each cycle phase and what characterizes them economically. Learn the leading indicators that market participants watch obsessively—the yield curve, consumer confidence, housing starts, initial jobless claims. Understand why the yield curve inverts before recessions and what that inversion means: when short-term rates exceed long-term rates, it signals expected weakness ahead. Move to lagging indicators and understand why unemployment rises long after a recession begins; firms wait to lay off workers until they're sure demand won't return. The final articles combine these into frameworks: how to assess where the economy is in its cycle, how different assets perform in each phase, and how to avoid the mistakes that even experienced investors make when reading cycle signals.

Articles in this chapter​