The cash market shuts on Friday afternoon. The headlines do not stop. A trader who holds index options over the weekend wants one thing on Sunday: a sense of whether anything has moved. An agent with a paid key can fetch that in one call. The work is in what it says afterwards.
What it reads
The tool is get_stocks_onchain. Inside the response is a block named implied_open. It holds the move on the S&P 500 perp and the Nasdaq 100 perp since the last regular cash close. Each is measured against the perp’s own price at the bell, taken from the 15-minute candle that ends there. The same measure is taken for the seven largest index names, shown unweighted, largest move first.
These perps trade around the clock on Hyperliquid’s builder books. They settle in a stablecoin and hold no shares. That is why they have a price on a Saturday when nothing else in the index does.
What it reports
Ask for a short page. The move on each index perp. The largest movers among the big names. Funding, only where a market sits far from its resting value. The age of the reading on every line.
A quiet weekend still gets a report. The perps are flat, here is the reading, here is its age. That is information, and it is covered in what a flat weekend tells you.
The wording it has to keep
The move is a market price on another venue. It is a real price that real traders paid. It does not tell you where SPY trades on Monday, and the agent should never phrase it that way. A model left alone will write that SPY is set to open lower. Tell it not to. The reasons are laid out in the implied open.
What it has to say is missing
There is no liquid perp on the Russell 2000 or IWM. An agent asked for the small-cap read should say none exists. It should not borrow the S&P 500 perp and relabel it. The gap is explained in why there is no implied open for IWM.
If a perp had no print at the bell, there is no figure for it. The agent should say so and leave the line blank. Perps also carry no dealer gamma, no flip and no walls. A weekend report that mentions a perp’s gamma has invented it.
How often to run it
Once on Saturday and once on Sunday evening covers most weekends. An agent asking every few minutes is spending requests on a number you will not act on until Monday. If you want to know the moment something moves, that is a job for a push, and a schedule cannot do it well.
Where NoVo shows it
Trader shows the implied open while the cash market is shut, on the Perps & Futures tab. It sends a push the first time an index perp is half a percent from its close. The agent’s version is the same reading over the MCP & API, laid out the way you asked. A wider Sunday habit is in a weekend routine for an index trader.