Economic cycle
What is Economic cycle?
The economic cycle is the fluctuation of broad economic activity between expansion and contraction, without a fixed length or regular schedule.
Cycle labels are most useful as a disciplined summary of evidence, not as inputs that overwrite the evidence. A portfolio view should show which observations support the label, their release dates, and how sensitive the conclusion is to revisions.
Expansion and contraction
During expansion, activity rises across much of the economy until a peak. A contraction follows until a trough, after which a new expansion begins. The cycle is identified from a range of production, income, employment, and spending data, not from a preset calendar. Trend growth can also slow without becoming a contraction, and different sectors may turn at different times.
What drives cycles
Cycles can reflect changes in credit, inventories, investment, productivity, policy, commodity supply, confidence, foreign demand, financial stress, or external shocks. Feedback matters: easier credit can lift spending and collateral, while falling income can weaken demand and loan quality. Each cycle combines distinct shocks and institutions, so a small historical sample should not be forced into one universal sequence.
Indicators and dating
Leading, coincident, and lagging indicators describe timing tendencies rather than certainty. Yield curves, surveys, permits, credit, employment, industrial production, income, and sales can conflict. Official turning points are commonly dated after evidence accumulates. Backtests must preserve release dates and revisions, otherwise revised data can create a forecasting record that was impossible in real time.
Portfolio relevance
Growth-sensitive equities and lower-quality credit often respond to expected changes before the economy turns, while government bonds may benefit from disinflation or policy easing. Sector, valuation, inflation, and policy conditions change the pattern. Portfolio construction should test regimes and balance-sheet vulnerabilities rather than rotate mechanically whenever one indicator crosses a threshold. Markets and the economy are connected but not synchronized.
Practical framework
Assess the level, direction, breadth, and surprise of growth, inflation, liquidity, credit, and policy. Distinguish a slowdown, recession, recovery, and overheating scenario, then map explicit exposures and catalysts. Use probabilities rather than a single confident label. Diversification remains necessary because cycle calls can be early, data can reverse, and asset prices may already discount the prevailing narrative.
Also known as: business cycle
Sources and further reading
- Business Cycle Dating, National Bureau of Economic Research
- Gross Domestic Product, U.S. Bureau of Economic Analysis