Definition
Think of an umbrella shop that does best when it rains. An inverse ETF is an exchange-traded fund designed to gain value when a stock market index falls. It moves in the opposite direction of ordinary stock investing, so it can earn a profit even when the market is dropping.
Investing in Reverse, Like a Contrarian
Normally, you make money in stocks when a company's value grows and its share price rises. But what can you do when a crisis hits and the whole market plunges? It seems like you can only sell everything and wait, or stare helplessly at the losses in your account. There is another way: ride the decline itself.
An inverse ETF is designed so that when a certain index falls 1%, its price rises 1%. For example, if the KOSPI, South Korea's index of leading companies, drops 2%, an inverse ETF tracking it rises about 2%. If the market rises 2%, your account loses 2%.
Betting on a falling price used to mean short selling (borrowing shares and selling them first, hoping to buy them back cheaper) or trading complicated futures. Thanks to inverse ETFs, you can now trade just like a regular stock, right from a brokerage app, one share at a time.
To Be More Precise: A Clock That Resets Every Day
To be more precise, an inverse ETF doesn't track the total return over a long period. It tracks the opposite of each day's change, every single day. This small-looking detail makes a huge difference over the long run.
Say an index falls 10% from 100 to 90, then climbs back to 100 the next day (a gain of about 11%). The index is right back where it started. But an inverse ETF, which follows the opposite of each day's move, goes from 100 up to 110, then drops about 11% to roughly 98. The index broke even, yet the inverse ETF lost about 2%. In finance, this is called negative compounding. In a sideways market, where prices bounce up and down without a clear direction, you can lose money just by holding it.
It's like a sandcastle that gets worn down a little with every wave. That's why experts don't recommend holding inverse ETFs for months or years. They're mainly used for short-term gains or to protect against risk when the market falls sharply in a short time.
A Shield for Your Savings
An inverse ETF is sometimes used like insurance for your assets. Imagine you've spent years building up a portfolio of good stocks, and a sudden recession looks likely to shake the market. Selling everything would cost you taxes and fees, and it's hard to time when to buy back in.
In that case, one approach is to keep your stocks and also hold some inverse ETF with part of your money. When stock prices fall, the inverse ETF's gains offset some of your losses. But this only works in proportion to the amount you put in, and only if your stocks move roughly like the index. This kind of strategy is called a hedge.
Still, betting your entire savings on a decline is very risky. Historically, stock markets have had their ups and downs but have tended to rise over the long term. An inverse ETF is like an umbrella you pull out for a little while when it rains: a supporting tool designed for short periods.
Common misconceptions
If a stock index falls and then returns to its original price, an inverse ETF also breaks even at 0%.
An inverse ETF is calculated from each day's return. So even if the index bounces up and down and ends up where it started, negative compounding causes a loss.
Where you meet it
On a day when the KOSPI plunges 3%, the price of a KOSPI inverse ETF rises about 3%.
If you put part of your money into an inverse ETF to prepare for a drop in the stocks you own, some of your losses are offset when prices fall.
In one sentence
It earns money when a stock index falls, but it wears away in a sideways market, so it suits short-term protection.