What a SPAC actually is

A special purpose acquisition company is a listed shell with no operations. It raises money in an IPO, puts almost all of it into a trust account, and then has a fixed period — usually 18 to 24 months — to merge with a real private company. If it finds one and shareholders approve, the private company becomes public. If it does not, the trust is returned to shareholders and the shell winds up.

That structure is the whole story. Nearly every question worth asking about a SPAC is a question about the cash, the clock, or the gap between them.

The three moving parts

• The trust — cash held for shareholders, invested in short-dated Treasuries. It grows slowly with interest and shrinks when shareholders redeem.
• The deadline — the date by which a deal must close. It can usually be extended, but extensions cost money and often trigger a redemption window.
• The sponsor — the team that formed the SPAC. They put up at-risk capital and receive founder shares, typically around 20% of the post-IPO share count, which become worthless if no deal closes.

The sponsor is paid for closing a deal, not for closing a good one. That asymmetry is the single most important thing to understand before reading anything else about a SPAC.

What a unit is

SPAC IPOs usually sell units rather than plain shares. A unit is one common share plus a fraction of a warrant, and sometimes a right. After a few weeks the pieces separate and trade under their own tickers. The share is a claim on the trust. The warrant is a long-dated option on the company that does not exist yet. They behave nothing alike, and conflating them is a common and expensive mistake.

Why the trust matters more than the price

Before a deal closes, a SPAC share is close to a Treasury bill with an option attached: hold it and you can redeem for your share of the trust, or sell into the market. That redemption right is why pre-deal SPAC shares rarely trade far below trust value, and why the difference between the market price and trust per share is the number most experienced holders actually watch.