Weekend S&P 500 options on-chain: where the risk sits

Crypto traders are using a young on-chain venue to bet on the S&P 500 when Wall Street is closed. According to CoinDesk, index options now make up the bulk of trading on Hypercall, an options exchange built on Hyperliquid. This article looks at how those contracts are priced and settled, and where a new trader could lose money.

What happened

Hypercall launched in June. Since then, the exchange told CoinDesk, it has handled $640 million of notional trading, and S&P 500 contracts make up more than 80% of it. Notional volume is the face value of the contracts, not the cash traders actually put up.

The venue lists daily, weekly and monthly expiries, and some of them fall on a Saturday or Sunday. Founder Jake Sylvestre told CoinDesk that "The volume is concentrated in options expiring the following day". Single-stock options are busy too: contracts on SpaceX, Nvidia, Micron and SanDisk make up over half of the trade count.

Hypercall is not alone. CoinDesk reported that Bybit began round-the-clock options on stock perpetuals on Sept. 17, and that Binance offers options on more than 1,000 American stocks and ETFs to eligible customers outside the U.S. CoinDesk also noted that Hypercall is still tiny next to traditional index options and next to Deribit, the Coinbase-owned crypto options leader.

The mechanics

An option gives its buyer the right to a payout if the price ends above (a call) or below (a put) a chosen level, called the strike, at expiry. The buyer pays a price up front, the premium. If the option ends out of the money, the premium is gone.

On Hypercall each contract has a $1 multiplier, so every index point is worth $1. CoinDesk's worked example: settle the index at 7,100, and a call struck at 7,000 returns $100. Payouts arrive in USDC, a stablecoin meant to track the dollar.

The settlement price is the key detail. It is not the official S&P 500 close. It is the average of Hyperliquid's own S&P 500 perpetual futures price over the final 30 minutes before expiry. A perpetual future is a crypto-style contract with no end date that is meant to follow an underlying price. On a weekend there is no live index to anchor it, so the perp price reflects what traders on that venue think the index is worth.

Prices on Hypercall come from market makers, firms that quote both a buy and a sell price. Sylvestre said they hedge on Hyperliquid's perpetual futures, weekends included, and must price earnings, economic data and company news that arrive while stock exchanges are shut. Two market makers are quoting now, three more are being added, and none has been named publicly.

Where the risk is

Short-dated options are cheap in dollars, which is part of their appeal. The trade-off is time. A next-day option has hours, not weeks, to move in the buyer's favour.

• Fast decay: an option that expires the following day loses its time value quickly. If the index barely moves, a buyer can lose the full premium overnight.
• Settlement gap: the payout follows a perp average on one venue, not the official index. If that perp drifts away from where the real market reopens, a trader can be right about the S&P 500 and still be paid on a different number.
• Thin pricing: with only a few unnamed market makers, the gap between the buy and sell price can be wide, especially on weekends when hedging is harder. That spread is a cost paid on every round trip.
• Off-chain steps: CoinDesk reported that collateral sits on-chain, but order matching is off-chain, and parts of margin and liquidation run off-chain too. The blockchain label does not remove reliance on the operator's systems working correctly under stress.

Sellers of options face a different problem. Writing an option collects a premium but can expose the seller to losses far larger than that premium, which is why margin and liquidation rules matter so much on any venue that allows it.

Why weekend pricing is harder

On a normal weekday the S&P 500 trades in deep, regulated markets, and an option's value can be checked against a live index. On a weekend that reference disappears. Anyone quoting a price has to guess how Monday's open will react to news, and then hedge with an instrument that also trades on the same crypto venue.

That makes the whole chain more circular. The option settles on the perp, the market makers hedge with the perp, and the perp itself has no official index to lean on until markets reopen. When a big headline lands on a Sunday, every link in that chain can move at once.

What to watch

Watch whether Hypercall names its market makers, and whether more firms joining narrows the spreads. Watch how closely the perp-based settlement price tracks the real index when markets reopen after a busy weekend. And check the venue itself: who runs the off-chain matching, what happens to open positions if it pauses, and which jurisdictions it serves. Sylvestre said Hypercall is not trying to replace Deribit, and that its users mostly trade markets Deribit does not offer.

Sources

• CoinDesk, 14 Oct 2026

Drafted with an AI model using only the sources listed, and released automatically after software checks on figures and originality. Nobody edited it by hand. For learning only; it does not tell you what to buy or sell.