Market data
Connect the useful ideas.

A market-data record is useful only when its origin, units, time, and meaning remain attached. This tag brings together guides on stock quotes, crypto books, housing data, and the workload created by collecting those observations.

Read these articles to distinguish a displayed price from an execution, a snapshot from a synchronized stream, and a reporting period from an import date. The examples emphasize field definitions and reproducible calculations rather than predicted financial outcomes. When comparing sources, check the required coverage and permissions before treating two values as interchangeable. The linked market-data page offers a shared provenance checklist, while the individual guides explain where each market needs its own handling.