The four phases
No economy grows in a straight line. Economic output expands for years, hits a peak, contracts (sometimes into recession), and eventually bottoms out before recovering. This pattern has repeated throughout modern economic history, though the length and severity of each phase varies enormously.
What drives each phase
| Phase | GDP | Unemployment | Interest rates |
|---|---|---|---|
| Expansion | Rising | Falling | Rising (central bank cools growth) |
| Peak | High, slowing | Low | High |
| Contraction | Falling | Rising | Falling (central bank stimulates) |
| Trough | Low, bottoming | High | Low |
How long does each phase last?
There's no fixed timer. The US expansion from 2009 to 2020 lasted 128 months — the longest on record. Contractions average around 11 months historically, though the Covid recession of 2020 lasted just two months (the shortest on record) thanks to massive government intervention. The cycle is driven by the interaction of credit, investment, consumer confidence, and policy — all of which are inherently unpredictable in timing.
Why the cycle matters for investors
Different asset classes perform better in different phases. Equities typically lead recoveries (the stock market rises before the economy does). Commodities tend to peak late in the cycle when demand is highest and supply constrained. Bonds usually perform best in contractions when interest rates fall. Knowing which phase you're in doesn't let you time the market perfectly — but it helps you understand why certain assets are moving.
"The four most dangerous words in investing are: 'this time is different.'" — Sir John Templeton
What this means for you
You don't need to trade the cycle actively to benefit from understanding it. But recognising that recessions are temporary, that recoveries eventually follow, and that markets typically anticipate turning points months in advance can help you stay calm during contractions — and avoid the "everything is great" complacency that tends to precede peaks.