Buying and selling predictions

You buy and sell a prediction from the market’s page, the same way on Hyperliquid and on Polymarket. What changes is which money pays for it and what happens to that money afterwards. If you are not sure yet how to read a market, start with What predictions are.

Buying

1. Open Predictions (in Invest, or its own tab with the Exchange bar) and tap the market.

2. Tap the side you think will be right, for example Yes · 62%. The Buy screen opens.

3. Type how much you want to put in. Underneath you will see:

   • Available X (Hyperliquid) or In your wallet: X (Polymarket): the money this purchase is paid with.
   • If you’re right, you get X: what it would pay you if your side wins, in dollars.
   • The fee, before you tap.
   • You pay X, when what you actually pay is not exactly what you typed, because shares come whole or because of the minimum.

4. Tap Buy. On Hyperliquid you will see Signing…. On Polymarket, first Checking the price…, then Moving money to the market… if money has to be taken there, and finally Signing….

5. When it is done you see Bought, with what you put in, the side and the market. On Polymarket you may see Order placed instead: the order is waiting for its price and nothing has been bought yet.

If a side has no price, the screen says “This side has no price right now.” If it already trades at the top, the button says Already at 100%: there is nothing left to win by buying it.

What money pays for it

Hyperliquid

Your cash on Hyperliquid, the same you use in Invest. It is what the screen shows as Available. If it is not enough, the screen tells you before you tap, with what you have and what is needed. To get more, see Add money.

The order fills at once against the offers on the book. Whatever does not fill at that instant is cancelled: it never stays open to buy later at another price.

Polymarket

Polymarket lives on another network, Polygon, and uses its own dollar. The app sorts that out on its own when you buy:

• It pays with the USDC in your wallet, plus whatever you already have on Polymarket. Cash on Hyperliquid does not work here: there is no direct route from one to the other. If your wallet does not have enough, the screen says so with both figures (“For Polymarket the money has to be in your wallet…”).
• Before moving anything, it checks the price, the minimum, and that you can trade from where you are. If anything fails there, nothing has moved.
• Then it moves what is missing to Polymarket: the stake plus the most its fees can cost. It moves at least $2 at a time. Whatever is left over stays there as Cash not in a bet.
• That money sits in a Polymarket wallet that is yours, tied to your Every wallet. Every does not hold it.

To bring it back: in Predictions, filter by Venue → Polymarket. You will see a card with what you have there that is not in a bet. Tap Move to your wallet and confirm with Move. It all moves, it arrives as USDC in your wallet within a few minutes, and it takes at least $2. Polymarket charges nothing to take it out, but swapping it to USDC can land a few cents less.

Selling before it resolves

You do not have to wait for the result. You can sell whenever you like while the market is open, at that moment’s price.

1. Open the market and tap the side you hold.

2. The screen shows what you hold: “Holding N «Yes» · X”. Tap Sell.

3. Review the sale: “You’re selling X of…”, You get approx. and the Fee. Tap Confirm sale.

4. You see Sold, or Order placed on Polymarket if the sale is waiting for its price.

Selling sells everything you hold of that side. On Hyperliquid, the money goes back to your cash on Hyperliquid. On Polymarket, it stays on Polymarket as Cash not in a bet until you move it to your wallet.

You can also see what you hold in Invest → Predictions. Hyperliquid’s are listed one by one; Polymarket’s are together in one row.

Minimums

	Hyperliquid	Polymarket
Buying	$10 at least, in whole shares	The market’s minimum number of shares; the page shows it under Minimum
Selling	No minimum: everything you hold of that side is sold	Everything you hold of that side
Moving money to or from Polymarket	Does not apply	$2 per move

On Hyperliquid, shares are whole and the minimum is strict. So what you actually pay may not match what you typed: the app adjusts to whole shares and shows You pay X before you tap.

Fees

Hyperliquid

• Buying: 0. Neither Hyperliquid nor Every charges to buy.
• Selling: Hyperliquid’s closing fee plus Every’s, 0.05% of what you sell.
• Collecting when it resolves: only Hyperliquid’s part. Every charges nothing.

The buy screen says it in full: “Fee: 0 to buy · up to X when you sell or collect”.

Polymarket

• Buying: two fees, on top of your stake. Polymarket’s, which each market sets (some have none) and which is highest when the price is near 50%, and Every’s builder fee, a percentage of what you buy that Polymarket charges on our behalf. The screen says “Fee: up to X” with the total, before you tap.
• Selling: Polymarket charges on sales too. The app cannot estimate it beforehand, and the sale review says so.
• Moving it to your wallet: Polymarket charges nothing; a few cents can be lost in the swap to USDC.

Every’s fees across all products are in Fees.

Caution

A prediction can lose all its value. Only put in what you are ready to lose, and read How it resolves before you buy.