Causes of the Business Cycle

Three Ways Monetary and Fiscal Policy Change It

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The business cycle is caused by the forces of supply and demand, the availability of capital, and expectations about the future. Here's what causes each of the four phases of the boom and bust cycle. When consumers are confident, they buy now.

  • Expansion: They know there will be future income from better jobs, higher home values, and increasing stock prices.  As demand increases, businesses hire new workers. The increase in consumer income further stimulates demand. A little healthy inflation can trigger demand by spurring shoppers to buy now before prices go up. A healthy expansion can suddenly turn into a dangerous peak. It happens when there's too much money chasing too few goods. It can either cause price inflation or an asset bubble.
  • Peak: If demand outstrips supply, then the economy can overheat. Investors and businesses compete to outperform the market, taking on more risk to gain some extra return. This combination of excess demand, and the creation of risky derivatives created the housing bubble in 2005. You can always recognize a peak by two things: First, the media says that the expansion will never end. Second, it seems everyone and his brother is making tons of money from whatever the asset bubble is.
  • Contraction: A contraction causes a recession. Three types of events trigger a contraction. They are a rapid increase in interest rates, a financial crisis, or runaway inflation. Fear and panic replace confidence. Investors sell stocks and buy bonds, gold, and the U.S. dollar. Consumers lose their jobs, sell their homes, and stop buying anything but necessities. Businesses lay off workers, and hoard cash. 
  • Trough: Consumers must regain confidence before the economy can enter a new expansion phase. That often requires intervention with monetary or fiscal policy. In an ideal world, they work together. That, unfortunately, doesn't occur often enough.

How Monetary Policy Changes the Business Cycle

Monetary policy is how the nation's central bank uses its tools to manage the economic cycle. It adjusts liquidity by changing interest rates and the money supply.

    How Fiscal Policy Changes the Business Cycle

    Fiscal policy is what elected officials use to change the business cycle. But they disagree on the best ways to implement it. As are a result, they don't take advantage of the power of fiscal policy.

    • Expansion: When the economy is in the expansion phase, politicians are content because their constituents are happy. They will pursue other goals, such as foreign policy, defense, or immigration. The United States is currently in this phase of the business cycle.
    • Peak: During the irrational exuberance phase, politicians continue to ignore fiscal policy. They would be smart to pursue a contractionary fiscal policy to avoid the peak. But politicians don't get re-elected by either raising taxes or cutting spending.
    • Contraction: This is when an expansionary fiscal policy is crucial. Elected officials are quick to cut taxes and increase spending to create jobs, demand, and confidence. The best unemployment solution in a contraction is government spending on public works and education jobs.
    • Trough: By this point, there is so much outcry among voters that the elected officials must do something to turn things around. That was successfully done in 2009 with the Economic Stimulus Act, which ended the Great Recession