How a leveraged ETF turns a fall into forced selling

What does a leveraged ETF actually promise?

A leveraged ETF promises a multiple of a single day's return, and nothing longer. REX Shares, a leveraged ETF issuer, describes it this way: a 2X fund "seeks 2X the underlying's daily return, then resets its exposure at each market close".

If the underlying rises 1% today, the fund aims to rise 2%. If it falls 1%, the fund aims to fall 2%. Over a week or a month, the result is each day's return compounded, which the issuer says is "very likely to differ" from twice the underlying's return over that period.

Most holders never picture the reset. After a gain, the fund needs more exposure to stay at 2X on a larger base. After a loss, it needs less. The fund adds into strength and cuts into weakness, every session.

Why does a flat market still cost a leveraged holder?

The base changes every day, so gains and losses of the same percentage do not cancel. REX Shares gives a two-day example, which scales cleanly to a ₹5 lakh position:

• The underlying rises 10%, then falls 9.09%, and ends exactly where it started.
• The 2X fund rises 20%, taking ₹5,00,000 to ₹6,00,000.
• The fund then falls 18.18% on the larger base, a loss of ₹6,00,000 x 0.1818 = ₹1,09,080.
• The fund ends at ₹4,90,920, which is ₹9,080 below where it began, with the underlying unchanged.

REX Shares calls the wider version volatility decay. In its hypothetical, a 2X fund on an underlying with 50% annualised volatility that ends a year flat would be expected to lose about 22%. At 100% volatility, the figure is about 63%. REX labels these as hypothetical, calculated before fees, and not based on any actual fund.

Source: REX Shares, "How Leveraged ETFs Work", https://www.rexshares.com/how-leveraged-etfs-work/, read 7 November 2026.

How does leverage turn a fall into forced selling?

There are two routes, and a market that has both is the dangerous one.

The daily reset sells into the fall

When the underlying drops, a 2X fund must cut its exposure by the close, so it sells. The bigger the drop, the larger the sale, and the sale lands at the same time as everyone else's. This is the buy-high, sell-low pattern REX Shares describes in its own explainer.

Silicon Canals reports that the share of Korea's July fall caused by this rebalancing is contested. The Financial Services Commission itself said the products were not the sole driver. The article's own summary is that the products did what their prospectuses said they would.

The margin floor sells for you

A margin loan lets an investor hold a larger position than their own money buys. The lender sets a floor, and if the position falls to it, the lender sells without asking.

Take ₹5 lakh of your own money and ₹20 lakh borrowed, a ₹25 lakh position, which is five times leverage. A 10% fall takes ₹2,50,000 off the position, which is half your ₹5 lakh. A 20% fall takes ₹5,00,000, all of it. The lender sells well before that point, and the sale is made at the lender's timing, not yours.

The rupee figures are an illustration of the arithmetic. The floor itself is set by each lender and is not a number this page can give you.

Both routes arrive together

A fall triggers the reset sale and the margin sale in the same session. Each sale pushes the price down a little further, which pushes the next account toward its floor. The first fall has its own cause. Leverage adds sellers to it, so the fall runs further than it otherwise would.

What happened in South Korea?

The Economic Times reported on 6 November 2026 that the Kospi fell 9% in a session and a circuit breaker was triggered. The index had nearly tripled in the year to its June peak and, by the report's figure, had fallen around 46% from that record high.

The same article says gains in two chipmakers drew a wave of individual investors, and leveraged ETFs linked to those chipmakers "also expanded".

Silicon Canals puts numbers on the borrowing side, citing the Financial Supervisory Service:

• Daily forced selling on unsettled margin accounts averaged 52.7 billion won in June.
• That was about seven times the 7.1 billion won daily average at the end of the previous year.
• Margin loan balances reached a record 38.63 trillion won on 24 June, according to the Korea Financial Investment Association.
• Sixteen single-stock leveraged and inverse ETFs had launched on 27 May, and regulators announced on 16 July a ban on new listings of single-stock leveraged ETFs.

No source read for this piece reports a later easing of those rules, so this page makes no claim about one.

Sources: The Economic Times, last updated 6 November 2026, https://economictimes.indiatimes.com/markets/us-stocks/news/ai-meltdown-kospi-crashes-9-hits-9-month-low-as-wall-street-bloodbath-after-midterm-elections-spills-to-asia-circuit-breaker-triggered/articleshow/135591355.cms, read 7 November 2026. Silicon Canals, https://siliconcanals.com/s-south-korea-approved-single-stock-leveraged-etfs-then-banned-new-ones-two-months-later-inside-the-margin-unwind-that-pushed-forced-selling-to-seven-times-last-years-pace/, read 7 November 2026.

What does this mean for a portfolio decision?

The useful question is who can force you to sell. In a position you hold outright, only you can. In a leveraged one, the fund's reset or the lender's floor can.

Take three percent of a ₹1 crore portfolio, ₹3,00,000, in a leveraged product. The size is small enough that a fall does not threaten the portfolio. The leverage changes who picks the exit. The sale happens on the product's schedule, and the price at that moment is whatever the fall has made it.

Rules that run on a schedule you can read are the opposite design. Qatobit's four QSI indices rebalance monthly on a published methodology, with the weights on the home and index pages. The only index fee is 0.35% per rebalance, with no annual management fee and no exit load. Around each rebalance you can see what was sold and what was bought.

On a ₹5 lakh basket, one rebalance at 0.35% costs ₹5,00,000 x 0.0035 = ₹1,750. The fee is shown before you confirm.

For related reading, what a crypto index is explains how a basket is built. Concentration risk covers how a few holdings can decide an outcome. Rebalancing after a 10% fall shows the schedule-driven version of selling and buying.

Where does the same mechanism show up in crypto?

Wherever a crypto platform lets a position be held on borrowed money, the floor works the same way. A fall reaches the lender's threshold, the position is sold, and the sale adds to the fall.

The questions to ask are the ones from the margin example. Who sets the floor, at what fall does it trigger, and who chooses the moment of sale? A product that cannot answer all three in writing has not told you what you own.

The next question is how a monthly rebalance differs from a forced one, and what to check on a platform's rebalance records.

Frequently asked questions

What is a leveraged ETF?

It is a fund that seeks a multiple of an underlying asset's return over one trading day, for example 2X, and resets its exposure at each market close. Returns over longer periods are the compounded daily results and differ from the stated multiple.

Why can a 2X leveraged ETF lose money when the underlying ends flat?

Daily returns apply to different base amounts. In the REX Shares example, an underlying that rises 10% and falls 9.09% ends flat, while a 2X fund ends 1.82% lower, which is ₹9,080 on ₹5,00,000.

What is forced selling?

It is a sale made by a lender or a fund rather than by the owner. A broker sells a margin position when it falls to the lender's floor, and a leveraged ETF sells to restore its stated exposure after a fall.

Did leverage cause the Kospi fall?

Not alone. Silicon Canals reports that Korea's regulator said the products were not the sole driver, and that how much of the fall came from rebalancing is contested. Leverage amplified a fall that began elsewhere.

How is a monthly index rebalance different?

It runs on a published schedule and methodology, so the investor can read when and why it trades. Qatobit's QSI indices rebalance monthly at 0.35% per rebalance, with no annual management fee and no exit load.

Crypto investments are subject to market risk. Not financial advice.