The exchange, and what a listing means

Shares existed before exchanges and trade beyond them now. What an exchange adds is the machinery this platform has described three times - and one thing no other track had: rules about what the company must tell you.

What listing standards actually buy a holder

• Disclosure: listed companies must publish audited accounts and announce price-sensitive information promptly - the raw material of module 5, mandated by the listing itself.
• A public book: the central limit order book from the earlier tracks, now for the asset itself rather than a derivative of it.
• Standardised settlement: shares delivered against payment on a fixed cycle, with the plumbing invisible until module 8's corporate actions make it briefly visible.

The exchange is not the whole market

A large share's volume splits across the primary exchange, competing venues quoting the same name, and off-book trades reported after the fact. Retail orders themselves often execute against a market maker rather than on the exchange's book. None of this changes what you own - a share is a share however acquired - but it foreshadows lesson 5: the price you deal at is a routed, brokered thing, and the exchange print is its reference rather than its guarantee.

Why this matters on day one

Because the listing is the boundary of this track's subject. Unlisted companies exist and are owned, but without continuous disclosure, a public book and standard settlement, they are a different asset with different rules. Everything from here assumes the listed kind - the kind whose price updates every second and whose obligations to inform you are enforceable. That bargain, disclosure for access to public capital, is what a listing is.