When-Issued Security
A conditional trading line for a security that has been announced but does not yet exist.
When-issued trading is a temporary market in a security that has been authorized or announced but not yet distributed — a spin-off share before the distribution date, a new share class before a reorganization closes, a merger consideration before completion. Trades settle only if and when the security is actually issued. The line carries its own temporary ticker, conventionally suffixed, and disappears at regular-way settlement.
In detail
A when-issued market lets price discovery begin before a security exists. The exchange authorizes the line once the terms of the future security are sufficiently defined — a spin-off ratio has been declared, a plan of reorganization has been confirmed, a merger's consideration is fixed — and trades executed on that line are contingent: if the event does not occur, the trades are cancelled.
When-issued lines come to exist by exchange notice, not by SEC filing, though the underlying event that creates them is always documented: a Form 10 or an information statement for a spin-off; a plan of reorganization and disclosure statement in a bankruptcy; an S-4 and proxy statement for a merger; an 8-K for a recapitalization. The exchange notice specifies the ticker, the start of when-issued trading, and the expected conversion to regular-way trading.
A holder of a when-issued position owns a contract to receive the security when it is issued, contingent on issuance. There is no vote, no dividend, and no claim if the event fails.
The related convention is the ex-distribution line: during a spin-off, the parent may trade both regular-way — carrying the right to the spin-off shares — and ex-distribution — without it. For a period, the same company has two live tickers with different economics, and the sum of the ex-distribution parent and the when-issued child is the market's estimate of the current whole. Due bills track the entitlement for shares that change hands between record and distribution dates. A data pipeline that treats the temporary tickers as new companies, or that carries their price history forward into the permanent security, produces artifacts that look like real events.
Lifecycle events: authorization by exchange notice; the record date and distribution or closing date, disclosed in 8-K; conversion to regular-way trading and retirement of the temporary ticker; or cancellation if the event fails, disclosed in an 8-K terminating the transaction.
Before assuming anything, confirm the line is when-issued and find the event it is contingent on; find the record date, the expected regular-way date, and the due-bill convention; and do not treat the when-issued price series as the permanent security's history — the two are related but not the same instrument.
These values are read from the filing linked above. They describe the instrument, not its merits. Nothing here is investment advice.