Leveraged and Inverse ETFs in 2026: Daily Reset Math, Volatility Decay, Costs, and the SEC's 2x Line

A leveraged ETF aims to return a multiple of an index's return, such as 2x or 3x, for one day. An inverse ETF aims for the opposite, or a multiple of the opposite. The words "for one day" carry most of the risk. Over longer periods these funds can do much better or much worse than the multiple suggests, and in choppy markets they can lose money even when the index ends where it started.

FINRA warned brokers in Regulatory Notice 09-31 that daily-reset leveraged and inverse ETFs are usually unsuitable for retail investors who plan to hold them for more than one trading session, and the SEC's investor bulletin makes the same point. This guide shows why with worked examples, then covers costs, the worst-day risk, the SEC's 2x limit, and alternatives for hedging.

How the daily reset works

A 3x S&P 500 fund with $100 of assets holds about $300 of exposure to the index, mostly through swaps with banks and index futures. At the end of each day it adjusts that exposure back to 3x its new asset value.

• After an up day, assets rise and the fund must add exposure. If the index rises 2%, the fund gains 6% to $106 and needs $318 of exposure, so it buys $12 more.
• After a down day, assets fall and the fund must cut exposure. If the index falls 2%, the fund drops to $94 and needs $282, so it sells $18.

The fund therefore buys after gains and sells after losses every day. In a trending market that helps. In a market that goes back and forth, it steadily loses. Inverse funds work the same way in reverse: after the index rises, an inverse fund's assets fall and it must reduce its short position.

What happens over more than one day

Illustrations, before fees and financing costs:

Three patterns stand out:

• Choppy markets hurt the most. In the second row the index lost less than 3% over a year, and the 3x fund lost more than a fifth of its value.
• Steady trends help. In the last row the 3x fund made more than three times the index's return.
• A smooth decline hurts less than the multiple suggests. In the third row the 3x fund was down 49.6% at the bottom, not 60%, because it cut exposure each day on the way down. It still did not fully recover.

A rough rule for the yearly drag from volatility is (L² - L) ÷ 2 × σ², where L is the leverage and σ is the index's annual volatility. The formula is an approximation in continuously compounded terms, and it shows why 3x decays three times as fast as 2x.

Broad US stock indexes have often run at 15% to 20% volatility. Single stocks and cryptocurrencies often run far higher, which is why 2x funds on individual volatile stocks can lose most of their value in a year even when the stock falls much less, and why long and inverse funds on the same stock can both lose heavily over the same period.

Costs besides volatility

• Expense ratios. ProShares lists UltraPro S&P 500 (UPRO), a 3x fund, at 0.89%, Ultra S&P 500 (SSO), a 2x fund, at 0.87% net, and Short S&P 500 (SH), a -1x fund, at 0.89%, as of September 2026. Broad index funds cost 0.03% or less.
• Financing. Borrowed exposure is not free. A leveraged fund's swaps effectively charge short-term interest on the extra exposure, roughly (leverage - 1) times the short-term rate plus a spread. With the secured overnight financing rate at about 3.88% in late September 2026, that is roughly 3.9% a year for a 2x fund and 7.8% for a 3x fund before spreads, on top of the expense ratio.
• Trading costs and taxes. Frequent trading means short-term gains taxed as ordinary income in a taxable account, and the funds themselves can distribute gains.

The worst day

A 3x fund loses its whole value if the underlying falls about 33% in one day; a 2x fund, if it falls 50%. For broad US stock indexes, market-wide circuit breakers halt trading when the S&P 500 falls 7% and 13%, and close the market for the day at 20%, so an index fund reaching zero in one session is unlikely. Individual stocks, overnight gaps, and cryptocurrencies have no such protection.

The clearest example is XIV, a Credit Suisse note that paid the inverse of short-term VIX futures. On February 5, 2018, volatility jumped, and after the close the note's indicative value fell to less than 20% of the prior day's value, which triggered an acceleration event allowing the issuer to redeem it. Holders were paid out that month at a small fraction of the price a few days earlier. XIV was an exchange-traded note rather than an ETF, but the daily-reset math that sank it is the same.

The SEC's 2x line

Funds registered under the Investment Company Act must follow Rule 18f-4, which generally limits a fund's value at risk to 200% of a reference portfolio. For a fund that tracks a multiple of an index, the reference is the unleveraged index, so 2x is the practical ceiling. Existing 3x funds were grandfathered when the rule was adopted in 2020.

In December 2025 the SEC sent letters to nine issuers, including Direxion, ProShares, and Tidal, saying their proposed 3x and 5x funds on stocks and cryptocurrencies did not fit the rule and asking them to revise or withdraw the filings. ProShares asked to withdraw its applications for several 3x funds. As of September 2026, no new 1940 Act fund above 2x had been approved, while existing 3x index funds kept trading.

Hedging: inverse ETFs and the alternatives

For a long-term investor, the simplest hedge is usually holding less stock. Our guides to tail risk hedging, options strategies, and volatility trading cover the option-based approaches, and the index fund guide covers building the core portfolio these funds are often paired with.

If you trade them anyway

1. Size positions by what the fund could lose on a very bad day, not on the underlying's usual moves.
2. Decide the holding period and exit before entering, and check the position daily.
3. Prefer 2x to 3x, and broad indexes to single stocks, if you want the decay to be smaller.
4. Expect the fund's return over weeks to differ from the multiple, even when you get the direction right.
5. Avoid funds with thin trading and wide bid-ask spreads.
6. Keep total exposure small relative to your portfolio. Losses can compound faster than you can react.

This guide is for informational purposes only and does not constitute investment advice. Leveraged and inverse ETFs are complex, can lose most or all of their value quickly, and are generally designed for short holding periods. Fund fees, rates, and rules are as of September 2026; the return tables are illustrations. Read each fund's prospectus and consult a qualified financial adviser before trading.