Deflation

Imagine prices across the stores drop 10% next month and 20% next year. A refrigerator that costs $750 today costs $675 next month and $600 next year. If you're not in a hurry, it's easy to wait. A little patience gets you the same thing for less.

When that expectation that prices will keep falling spreads through a whole society, people start to put off spending. Unless it's an absolute necessity, they close their wallets and let the cash sit in their bank accounts.

With shoppers staying away, unsold goods pile up in stores and factories. To clear out that stock, companies cut prices even more sharply. That only convinces people even more that they should wait a little longer before buying.

Before long, money stops moving through the economy, and economic activity cools down. That's the first link in a vicious cycle.

When goods don't sell, company sales and profits plunge. To survive the immediate crisis, companies stop investing in the future, like building new factories or doing research and development. To cut labor costs, they freeze hiring, cut pay, and start offering voluntary retirement packages.

Households that feel less secure about their jobs and have less money in their pockets cut their living expenses even further. This chain, where lower spending hurts company earnings, which leads to job insecurity and then even weaker spending, is called a deflationary spiral.

There's another problem: debt gets heavier. When prices fall, the real value of money goes up, so paying back the principal on an old loan becomes a much bigger burden. Households and businesses both end up spending their money on debt payments, leaving nothing to spend elsewhere, and they risk going bankrupt.

Falling asset prices, like real estate and stocks, often feed deflation, and deflation feeds them in return. Sometimes deflation starts when an asset bubble bursts. Other times it pushes asset prices down even further. When this keeps repeating, a whole country can sink into a long slump.

To be a bit more precise, prices falling for certain electronics or services because of new technology is not deflation. When better production methods let companies make cars or TVs more cheaply, that's a positive supply-side innovation that makes people's lives richer.

The truly dangerous kind of deflation is when demand itself, meaning people's desire to buy, collapses, and prices across the whole economy fall like dominoes. At its core, it's about economic sentiment freezing up and the speed at which money moves through the market grinding to a halt.

That's why many central banks are extremely wary of inflation sitting at 0% or dropping below zero. Major central banks, including those of the U.S., the eurozone, Japan, and Korea, generally aim for mild inflation of around 2% a year and adjust monetary policy using tools like the benchmark interest rate. The exact target varies a bit from country to country. Prices need to rise just a little so people don't put off spending and investing, and so central banks keep room to cut interest rates when the economy weakens.