After-hours index references and the next cash open
Source: Hyperliquid / Last updated: / Perpetual-futures prices are reference values.
The session clock and the overnight reference
Equity-index cash sessions have an open and a close. After the close, the official index owner is not publishing a new cash print for that session. Futures-style markets can still have a price. StockTicker24 uses that second market: the perpetual-futures reference, which can keep updating overnight, on weekends, and on cash-market holidays.
| When it exists | What it is not | |
|---|---|---|
| Cash index | Cash session | A 24-hour official index |
| Perpetual-futures reference | Can continue after cash close | The next cash open |
| Close-to-close ratio | Only if the cash close was collected | Yesterday's derivative close under a cash-close label |
The overnight reference and the next cash open remain separate prints.
The next cash open is not predicted here
Readers often want one question answered: "what will the cash index do at the next open?" This site does not answer that question. The overnight reference and the next cash open are different prints from different venues. They can gap. They can fail to gap. The board shows the reference it has now. It does not convert that reference into a predicted cash open.
How the close side is labeled
When a card shows a close-to-close ratio, the close is the cash-market close of the related venue, if that close was collected. The current side of the ratio is still the perpetual-futures reference. Mixing an official close with a live derivative print is intentional and labeled. Substituting "yesterday's derivative close" when the cash close is missing would make the ratio describe a calculation the label does not name, so the ratio is omitted instead.
Weekends and symbol-specific sessions
Weekends are the same rule with a longer dashed segment. The board can move while cash is shut. Monday's cash open remains a separate event. The site does not hold the weekend print as a Monday forecast.
Index cards and single-stock cards share the omission rule and the line-style rule. They do not share session hours. A U.S. stock's cash hours are not Tokyo's. Each symbol keeps its own session table.
Common questions
Does a weekend dashed segment forecast Monday?
No. Monday's cash open remains a separate event.
Do index cards and single-stock cards share session hours?
No. They share the omission rule and the line-style rule. Each symbol keeps its own session table.
Where is the Japanese-language corpus?
A separate set of pages, not translations, is listed at /ja/articles/.
For the English reading of line styles, see the solid-and-dashed note. For the English reading of labels, see labels and gaps. Japanese-language articles on overnight index prints are a separate corpus at /ja/articles/.
An after-hours index reference is a live derivative print. It is not the next cash open.