Leveraged ETF Decay: It Is Not a Fee, and It Does Not Always Cost You

Almost every explanation of leveraged ETF decay stops at "they lose value over time," which is wrong in a way that matters. Decay is not a charge the fund levies. It is a consequence of compounding a daily multiple, and its size depends entirely on how the index travelled, not on how long you held.

Get that straight and two things follow that most coverage never mentions. In a choppy market, a 3x fund can lose money while the index is exactly flat. And in a steady trend, the same fund can return considerably more than three times the index’s return, in your favour.

Both come out of the same arithmetic. Here it is.

The mechanism in one sentence

A leveraged ETF resets its exposure every day so that tomorrow it again delivers its stated multiple of tomorrow’s move. Because each day’s return is applied to a new balance, your result over any period is the product of the daily returns, not the sum of them.

Multiplication of a sequence and a simple multiple are different operations, and the gap between them is the entire subject.

Case one: the market goes nowhere, violently

Take three round trips. In each, the index rises and then falls back to exactly where it started. Only the size of the swing changes.

Work the middle row by hand, because doing it once makes the rest obvious. The index goes to 110, so the fund goes up 30% to 130. The index then falls 9.09% to get back to 100, so the fund falls 27.27%, and 130 times 0.7273 is 94.55.

Nothing was deducted. No fee was charged. The fund gave you exactly three times each day’s move, both days, and you are down 5.45% while the index is flat.

Now look down the column. The loss goes from a quarter of a percent, to five and a half percent, to twenty percent, as the swing goes up fivefold and then doubles. The damage grows roughly with the square of the size of the moves. That is why the effect is called volatility drag, and it is why two months with identical start and end points can produce wildly different results.

The proper name for the general phenomenon is path dependency. David Dziekanski of Quantify Funds, whose products are designed around the problem, used both terms in the same breath when describing what he was trying to avoid: "leverage with less path dependency and potential for decay."

Case two: the market trends, and the arithmetic pays you

Here is the half that gets left out.

Suppose the index rises 3% a day for five consecutive days. Compounded, it finishes up 15.93%. Three times that number is 47.8%.

The 3x fund rises 9% a day for five days. Compounded, it finishes up 53.9%.

The fund beat three times the index return by six percentage points. The same daily reset that punished you in the choppy market is now working for you: every day the fund’s exposure is increased to match a larger asset base, so each subsequent 9% is applied to more money.

The downside case is also gentler than people expect. If the index falls 3% a day for five days, it finishes down 14.13%, and three times that is a loss of 42.4%. The 3x fund finishes down 37.6%. It lost less than three times the index, because the daily reset reduces exposure as assets shrink.

That deleveraging on the way down is a genuine structural feature. It is also why these funds do not go to zero in a crash and instead grind toward it in a chop.

So what actually determines your outcome

Two variables, and holding period is not one of them except through its effect on the first.

The realised volatility of the path. High volatility hurts, and it hurts more than proportionally, which is the drag itself.

The strength and consistency of the trend. A persistent move in one direction compounds in your favour and can more than offset the drag.

A leveraged fund held through a strong, smooth trend can beat its multiple. The same fund held through an equally long sideways grind can lose money in a market that did nothing. Time is not the variable. The path is.

Which reframes the standard warning. "Do not hold these long term" is decent practical advice and a poor explanation, because it points at the calendar when it should point at the volatility. The honest version is that the longer you hold, the more path you accumulate, and the less any single day’s accuracy tells you about your result.

Why this catches professionals too

Mo Sparks, Chief Product Officer at Direxion, was unusually candid about the gap between design and use. He deals "with a lot of advisors that really don’t understand that, like, it’s a daily, and there is a decay" in the product.

That is the largest issuer in the category saying that professional users misread the instrument. The reason is not that the arithmetic is hard, because it is two lines of multiplication. It is that the product’s name describes its leverage and says nothing about its reset, and the leverage is the part everybody remembers.

Dziekanski also flagged the labelling asymmetry, noting that some products, "unlike the daily use leveraged ETFs, don’t come with warnings of daily use." Reading the objective rather than the ticker is the whole defence.

How to use this

If you are holding a leveraged fund for more than a day or two, the questions worth answering before you size the position:

What has realised volatility been in this index recently, and what do you expect it to be? That number, more than your directional view, determines what the drag will cost.

Is your thesis a trend or a level? A trend thesis compounds in your favour. A level thesis, where you expect the index to be at some price by some date and do not much mind the route, is exactly the case where the route will decide your result.

Have you compared against the plain fund? Over a long, choppy stretch, an unleveraged position in the same index, sized up, can beat the leveraged fund on the same view, and that comparison is easy to run and rarely gets run.

Do you know the fund’s reset frequency? Almost all are daily. A small number are not, and for those the entire analysis changes.

The line worth keeping

Decay is the difference between compounding a multiple and multiplying a total, and it grows with volatility rather than with time.

A leveraged ETF does exactly what it says every single day. What it does over a hundred days is a question about those hundred days, and nobody, including the fund, knows the answer in advance.

This is educational content and not investment advice. It is not a recommendation regarding any security. Investing involves risk, including possible loss of principal. Past performance does not guarantee future results.