A leveraged ETF uses derivatives and borrowed money to multiply the return of an underlying index. A "2x" fund targets twice the index's return. A "3x" fund targets three times it. The multiplier applies to the return on a single trading day, not to the return over any longer stretch of time, and that distinction changes what these funds do to your money over a longer holding period.
What "daily" means in practice
Every trading day, a leveraged ETF resets its exposure to hit its target multiple again the next day. That daily reset means the fund compounds day over day, not period over period. Two paths that produce the same overall return over a month or a year produce different results for a leveraged fund, depending on how much the index moved up and down to get there.
A simple example of volatility decay
Say an index starts at 100. It rises 10% on day one, to 110, then falls 10% on day two, back to 99. The 1x index ends down 1% over the two days. A 2x fund tracks 20% on day one, taking a starting value of 100 to 120. On day two the index falls 10%, so the fund falls 20%, taking 120 down to 96. The 1x index lost 1% over two days. The 2x fund lost 4%, not 2%. That gap is volatility decay, sometimes called beta slippage. It comes from compounding a multiplied return daily instead of applying the multiple once to the total period return. The more the index moves up and down along the way, even if it ends close to where it started, the more decay eats into the leveraged fund's result.
Built for days, not years
Fund providers design and market leveraged ETFs as short-term trading tools, held for a day or a few days around a specific view on where the market goes next, not as buy-and-hold positions. Hold one for months or years and the daily compounding effect above stacks up, especially in a choppy or sideways market. The fund's long-term return often looks nothing like the underlying index's long-term return multiplied by two or three, and a flat or modestly positive underlying index still produces a loss in the leveraged version.
Costs stack on top
Leveraged ETFs also carry meaningfully higher expense ratios than broad-market ETFs, reflecting the cost of the swaps, futures, and other derivatives used to generate the leverage. That fee applies regardless of how the fund performs, and it compounds against you the same way the volatility decay does.
Nothing here recommends holding or avoiding any specific leveraged ETF. These products carry meaningfully higher risk than broad-market index ETFs, and this is educational information, not investment advice.