What leverage actually does to a long-term holder

The pitch is irresistible: if the index goes up over the long run, a fund that delivers 2× or 3× the index's daily move should go up faster. Hold it for a decade, compound the difference, retire early.

The fine print is the word daily. Leveraged funds multiply each day's return, then reset. Over any period longer than a day, what you own is not 2× the index's return — it is the compounded product of doubled daily moves, and compounding treats gains and losses asymmetrically.

Take an index that drops 10% one day and rises 10% the next. The index ends at 99% of where it started — a 1% round-trip loss. The 2× fund drops 20% then rises 20%: it ends at 96%. Same two days, four times the damage. That extra loss is volatility decay, and every choppy stretch charges it again.

This is why a sideways, turbulent market — which costs an unleveraged holder roughly nothing — quietly grinds a leveraged fund down. The decay is not a fee anyone discloses; it is built into the arithmetic of daily resets, on top of the very real financing and management costs these products also carry.

Broad indices have historically suffered drawdowns of −50% and worse. That is survivable for a patient index holder — brutal, but survivable, and our research treats holding through it as the move that historically got paid.

At 2-3× leverage, the same crash arrives as −80% or deeper. The recovery math turns vicious: a −50% loss needs +100% to break even, but −80% needs +400%, and −90% needs +900%. A drawdown an index holder waits out becomes, for a leveraged holder, a hole that can take decades to climb out of — if the product survives at all.

We tested leveraged exposure the way we test everything: across multiple decades and market regimes, not just the windows that flatter it. The result was consistent with the arithmetic above — leverage did not robustly beat unleveraged, tax-free index holding once the full range of regimes was included.

It wins, sometimes spectacularly, in one specific environment: a sustained, low-volatility bull market. 2010-2021 was exactly that, which is why a decade of screenshots makes leveraged funds look like a cheat code. But choosing leverage because of that regime is a bet that you can predict regimes — and regime prediction is the original unsolved problem this entire project kept running into.

Everything in our lump-sum and crash articles about holding through drawdowns applies here, multiplied. If a −50% drawdown tempts an investor to capitulate, −80% with the press calling the product a scam is far harder — and selling there converts the decay math into a permanent loss.

Leverage also shrinks the room for ordinary life: a cash need that arrives mid-drawdown forces selling at the worst possible point. The deeper the trough, the more likely the timing of your life and the timing of the market collide.

Leveraged funds are short-horizon instruments being marketed, in practice, as long-term holdings. Held long-term, they pay volatility decay in calm-but-choppy times, face drawdowns that arithmetic makes nearly unrecoverable in crashes, and only dominate in regimes nobody can reliably call in advance.

Our verdict stays boring on purpose: the unleveraged, tax-free index holding remains the benchmark nothing we tested robustly beat — including the version of it that borrows to go faster.