When a hundred turbos knock out at once — a structured-products desk on 24 February 2022

If you issue leverage products — turbos, knock-out warrants, barrier certificates — you take the opposite side of the client's delta and hedge it in the underlying. The barrier is the price at which that hedge stops existing, instantly. On a quiet day you unwind it into a liquid market and nobody notices. On 24 February 2022, hundreds of barriers broke at once on a gap, and every one of those hedges had to be unwound at a price that hadn't existed a minute earlier.

The open

The invasion happened overnight. By the European open, index futures had gapped several percent lower and anything with Russian exposure was in freefall — no clean intermediate prices, just a hole between yesterday's close and where the market actually reopened. For a book of long turbos clustered near their barriers, a gap down through the barrier is the worst possible shape of move: not a slide you can hedge into, a jump you wake up on the wrong side of.

What a knock-out actually does

Which way you're hedged depends on the product. A long turbo leaves the client delta-long, so the desk is delta-short and hedges by buying the underlying. A short turbo leaves the client delta-short, so the desk is delta-long and hedges by selling — borrowing — the underlying (which is why you only issue shorts on names you can borrow cheaply). When a product knocks out, that delta leg simply vanishes, and you unwind the hedge that was standing behind it: the long products force you to sell the stock you were holding; the short products force you to buy back the stock you had shorted.

A crash knocks out the long products. Their barriers sit below spot, so a gap down breaches them in a single jump — and each one leaves you holding stock you now have to sell into a market that has already fallen. In theory you unwind atthe barrier; in a gap there is no print at the barrier, the first tradable price is well below it, so you sell beneath the level the product was meant to stop at and the slippage is your loss. Multiply that by every long product that broke and the desk is pushing a very large amount of stock into a one-way market in a single clip — the hedge couldn't keep up with the jump, which is exactly what gap risk on a barrier feels like. (The short products are fine that morning; they're moving awayfrom their barriers. Their bad day is the violent rally, when the same thing happens in reverse and you're forced to buy stock into a spike.)

The part nobody teaches: the operational avalanche

The market risk is the story people expect. The part that actually decides whether the day is survivable is operational. When a leverage product knocks out, it doesn't just disappear — it triggers a lifecycle: compute the residual (unwind) value, publish the knock-out notice, and, for some listing venues, actively notify them (others pull it themselves — the requirement is not uniform). One product, that's an email. A hundred products knocking within the same hour, it is physically impossible to do by hand — and doing it wrong or late is its own risk.

So the desk that survives 24 February is the one whose knock-out lifecycle was automated before the crisis: a query that pulls every product that breached its barrier, a script that computes each residual from the actual unwind prints, and notices that are generated and dispatched rather than typed. A clean SQL pull feeding a small VBA or Python routine is worth more, on a day like that, than any hedging insight — because the alternative is a hundred manual emails while the tape is still gapping. Ops risk ismarket risk when the ops don't scale.

Then you rebuild

Once the old products are wiped out, the shelf is empty — and clients still want leverage. So you re-issue. And this is where the interesting decision lives, because choosing the leverage of a new turbo is choosing its barrier distance, and in a high-volatility regime that choice is a vice.

Push the barrier close to spot and you sell high leverage — attractive, cheap-looking exposure — but in a tape running at crisis volatility, that barrier gets touched again fast, and you're back in the same knock-out avalanche. Push the barrier far away and the product is safe, but now it's deeply in-the-money, so it costs almost as much as the underlying itself — at which point the client rightly asks why they wouldn't just buy the stock. Higher volatility raises the probability of touching the barrier at every distance, so the whole trade-off shifts against you: the leverage that clients want is exactly the leverage the regime makes dangerous to issue.

There's no free answer. You manage it — shorter maturities so a single product carries less overnight exposure, financing and barrier distance re-priced to the current vol regime rather than the calm one you designed the shelf in, and an honest read that in a vol spike the "cheap leverage" a turbo advertises is really a short-volatility position wearing a retail costume.

The lesson

Three things that stay with you. Barrier distance is not a product feature, it's a volatility bet — and you are on the short side of it. Gap risk is the risk that doesn't show up in the calm-market greeks and shows up entirely on the days that matter. And the automation of the knock-out lifecycle is not back-office housekeeping — it's what lets the front office keep trading while a hundred products settle at once.

Then push volatility up in the Barrier pricer and watch the knock-out probability climb. The mechanics behind the product itself are in Turbo — leveraged tracker that dies on a barrier.