Inflation vs Deflation

In the most common sense, inflation is an increase in the average price of goods over a period of time. The rate that prices increase is known as the inflation rate. Inflation happens either when costs go up or when it takes more money to purchase the same items.

CPI is not the same as inflation. Inflation is the change in CPI over a period of time. It can be calculated as [CP1 Year 1 – CPI Year 2]/CPI Year 2, where Year 1 is greater than Year 2. Using the example above the inflation rate from 1984 to 2009 would be 95%. That\’s (195-100)/100.

Using CPI isn\’t necessarily an indicator of the specific inflation rate for any given consumer since the goods and services you purchase may not be included in the basket. Instead, CPI and the inflation rate is an approximate value for the country in total.

Monetary inflation occurs when the amount of money in circulation goes up faster than the quantity of goods in circulation. The government is the only entity who can do this. In the old days, they would simply print more money. Today, the government buys securities from banks, thereby maximizing the money supply.

Inflation can eventually lead to deflation. In theory, people would spend less money when prices are increasing, but that\’s not always what happens. In practice, people spend the money now because they believe the prices will be higher in the future. If they don\’t have the money for desired purchases, then they borrow it.

Another disadvantage to inflation is that it puts some goods and services out of reach for consumers. Rarely do wages increase the same rate as inflation, so consumers have less cash to spend. As the gap between income and costs closes, so does spending. That situation could eventually lead to deflation.

Generally, deflation is when the average cost of goods decreases. When the inflation rate falls under zero, indicating negative inflation, we know that there has been deflation. Remember that the inflation rate is calculated based on the change in the Consumer Price Index, or CPI.

Inflation and deflation are both parts of a properly functioning economy. They usually happen in cycles and could correct themselves without any government intervention. However, in extreme situations, like the Great Depression, the economy does need a helping hand from the Feds.