But the enormity of the 2008 financial collapse required government and central bank intervention never before seen in the global economy. After Lehman Brothers, one of America's biggest investment banks, was allowed to go bankrupt, the Federal Reserve was required to bail out AIG, the world's largest insurance company. The $85 billion bailout was, until then, the biggest bailout in American economic history.
Stock market declines of more than 50% in some countries presaged a global economic meltdown. The concerted action of the world's central banks, including the U.S. Federal Reserve, the Bank of England, the European Central Bank, and the Bank of Japan, helped calm things down for a while. Just as the speed of an engine is regulated by its fuel supply, a country's economy is controlled by regulating its money supply- and each country's monetary policy is the responsibility of its central bank. In Britain, it's the Bank of England; in Switzerland, it's The Swiss National Bank; in the United States, it's the Federal Reserve; in the euro zone countries, it's the European Central Bank; and in Japan, it's the Bank of Japan. Despite the tendency of the media to concentrate on the latest economic statistic, there is no one single indicator that tells us how fast an economy is growing- or if that growth will lead to inflation down the road. And, unfortunately, there is no way to know how quickly an economy will respond to changes in monetary policy. If a country's central bank allows the economy to expand too rapidly- by keeping too much money in circulation, for example- it may cause "bubbles" and inflation. If it slows down the economy too much, an economic recession can result, bringing financial turmoil and rampant unemployment.
Central bankers, therefore, need to be prescient- and extremely careful- keeping one eye on inflation, which is the product of an overheating economy, and one eye on unemployment, which is the product of a slowing economy. In the 21st century economy, however, regulating money supply has become a much more difficult task. Inflation and unemployment have become the yin and the yang of the 21st- century economy. It used to be that reports of a surging economy brought euphoria to the markets. Reduced unemployment means that companies are forced to pay higher wages for scarce workers, and prices of goods and services need to be raised to pay for the increased cost.
In a booming economy, inflation can grow quickly as consumers and businesses begin to compete for increasingly scarce goods and services- and scarcity leads to higher prices. The result is usually a vicious circle of wage and price increases that end up hurting almost everyone- especially those on fixed incomes, who see their buying power decline when prices rise.
The international markets watch each country's inflation rate carefully- always on the lookout for signs that an economy is stalling or overheating. International investors, including gigantic pension funds, hedge funds, and international banks, move billions and sometime trillions of dollars, pounds, euros, and yen around the world on any given day, looking for the best return on their investment. When a country's economy looks like it is growing too strongly, and inflation is about to rear its ugly head, international investors can move their money out of an economy at a moment's notice, preferring to invest their funds in countries with more stable economic growth and low inflation.
Just as a prudent driver keeps an eye on the road ahead, a country's central bank tries to keep the economy on a steady course. Central bankers need to look at all the economic data, such as factory orders, housing starts, consumer credit, retail sales, manufacturing, construction and employment figures-some of which are leading and some of which are lagging indicators-in an ongoing effort to keep the economy from overheating or sliding into recession.