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LEARN · DATA HYGIENE
An as-of stamp is the observation time for a quote, filing, or macro print. It tells you when the source value was captured — not when you loaded the page.
Delayed public data can lag by minutes. Citing as-of prevents readers from treating a desk snapshot as a live blotter.
Terminal panels, stock pages, themes, and the daily brief show provider + as-of on citation chips. Empty values stay — with a reason when tools fail.