2026-09-28: Kioxia Stock Split
KIOXIA position settlement, order cancellation and reopening arrangements for Kioxia's 3-for-1 stock split.
Kioxia stock split: 28 September 2026
TradeXYZ will suspend trading and settle all open KIOXIA perpetual positions at approximately 06:35 UTC on Monday, 28 September 2026, in connection with Kioxia Holdings' 3-for-1 stock split. Trading is expected to resume around 07:30 UTC on the post-split basis.
Settlement closes each position and realizes its profit or loss in USDC. All outstanding orders, including take-profit and stop-loss orders, will be cancelled. To re-establish exposure after reopening, traders must open new positions and submit new orders.
Trading schedule
KIOXIA trades normally until 06:30 UTC. All times below are on 28 September 2026; Tokyo is UTC+9 and New York is UTC−4.
The halt is expected within five minutes of the time shown. Reopening timing is indicative.
06:30
15:30
02:30
The official closing price (TSE: 285A) determines the settlement price. xyz:KIOXIA enters a reduce-only period.
06:35–06:40
15:35–15:40
02:35–02:40
Trading halts. Positions settle and outstanding orders are cancelled.
07:30
16:30
03:30
Indicative (approximate) reopening time. The temporary open-interest restriction is removed and 24/7 trading resumes on the new share basis.
Settlement is automatic and carries no trading fee. It removes the margin requirement for the closed position. Traders who wish to exit through the order book before the procedure begins should close their positions before 06:30 UTC. Trades before the halt and after reopening remain subject to standard trading fees.
Settlement and reopening prices
Settlement uses Kioxia's (TSE: 285A) official closing price on 28 September, converted to USD at the oracle's USD/JPY rate at 06:30 UTC. USD/JPY is expressed as yen per US dollar.
Settlement price (USD)
Official TSE close (JPY) ÷ USD/JPY rate
Reopening reference price (USD)
Settlement price ÷ 3
The split replaces each share with three shares, so the reference price per share is divided by three. Hyperliquid does not currently support rescaling open positions for a stock split; the transition therefore requires settlement and reopening.
For example, a TSE close of ¥45,000 and a USD/JPY rate of 150.00 produce a settlement price of $300.00 and a reopening reference price of $100.00. At those prices, 30 post-split units represent the same $3,000 notional exposure as 10 pre-split units.
The reopening reference price initializes the oracle; execution prices depend on the order book. The oracle initially uses internal pricing, with external pricing scheduled to resume at 08:00 UTC, when the night session opens, subject to post-split market data being available.
The market retains the identifier xyz:KIOXIA and its asset ID. Existing leverage limits, margin requirements and risk limits apply after reopening. New orders must use post-split prices and quantities.
Timing of the transition
The transition follows the last pre-split session and precedes the subsequent night session of continuous trading, which uses the next trading day’s share basis. These trading arrangements take effect before the split's legal effective date of 1 October.
TradeXYZ will publish any changes to these arrangements on this page and through its official channels.
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