What Are Leveraged ETFs? Double the Gains, Double the Risk

If you've browsed a Korean brokerage app lately, you've probably noticed products like 'Samsung Electronics 2X' or 'SK Hynix Leveraged ETF.' As the name suggests, these are designed so that when the underlying stock rises 1%, you gain 2%. Sounds great — but how does it actually work?

A quick recap: what's an ETF?

An ETF (Exchange-Traded Fund) is a fund you can buy and sell like a stock. Instead of buying a full share of Samsung Electronics, you can invest a small amount in an ETF that holds it. A regular ETF simply mirrors the performance of its underlying asset. A leveraged ETF amplifies that performance — typically by 2x.

How do they create 2x returns?

Leveraged ETFs use derivatives — instruments like futures and swaps — to build a position larger than the cash invested. Think of it as putting up 1 million won to control 2 million won worth of exposure. That means when the stock rises, gains are doubled. But when it falls, so are the losses. If Samsung drops 3% in a day, the leveraged ETF falls by roughly 6%.

Single-stock leveraged ETFs are even riskier

Some leveraged ETFs track broad indexes like the KOSPI 200, but others track just one specific stock — like Samsung or SK Hynix. A recent report from the Korea Capital Market Institute found that after single-stock leveraged ETFs were introduced, volatility in those stocks actually increased. Short-term speculation via these products can create a feedback loop, making the underlying stock swing more wildly than it otherwise would.