4 posts tagged with "hyperliquid"

From the outside, a prediction market is the same thing everywhere. You pay something under a dollar for a claim on an outcome, and if the outcome happens you collect a dollar.

The mechanics underneath are not the same, and the differences are not cosmetic — they determine what you actually own, what it costs to get in and out, and which specific things can go wrong. BT365 runs both Polymarket and Hyperliquid's HIP-4 outcome markets, so this is a comparison from having implemented against each rather than from reading their docs.

Most order-handling code is written as if there are two outcomes: the order worked, or it didn't.

There is a third, it is more common than people expect, and it is the one that actually costs money. You send an order. The connection stalls, or the venue returns a shape you don't recognise, or a gateway hands back a 502. You now do not know whether you have a position.

Most explanations of leverage stop at the point where you open one position. The interesting behaviour starts at the second one.

If you are long one market and short another and the first goes badly, what happens to the second? The answer depends entirely on whether your positions share collateral — and on a unified margin account, they do. That is the whole design, and it is rarely spelled out before you use it.

Here is a situation with no obviously right answer, which is why it is worth writing about.

You hold a position in an outcome market. It has not resolved. The venue removes the market — the event was cancelled, or the listing was migrated, or the whole set was replaced. The last price it traded at was forty cents. What is your position worth?