tengu_v3_reference_history

io.github.Hlobo-dev/tengu-firm · Verify this server

IDENTIFIER HISTORY for one symbol — every identifier this security has ever been bound to, with the dates each binding started and ended, plus the dated events where the ISSUER changed its name, ticker or CUSIP. This is the part of a crosswalk a current-state table cannot give you: it answers 'what was this on 2015-06-30', 'when did this CUSIP change' and 'what was this company called then'. Returns the timeline grouped by identifier rung (each entry with valid_from, valid_thru and whether it is still current), the issuer change events with what changed at each one, and — with as_of — the exact set of identifiers in force on that date. Use it to back-map a historical holdings file, to audit identifier drift in your own data, or to explain a ticker that no longer exists. STALENESS, stated rather than implied: the issuer change log is a VINTAGE snapshot that lags the live security master (as-of 2026-04-20 when this shipped, 104 days old, newest change event 2026-01-30). Its age in days and its expected cadence are in every response, and any disagreement between it and the live spine is named explicitly rather than blended into one confident answer. Coverage is a number: 969,333 identifier bindings on file, 759,618 of them retired, 38,850 of 77,313 securities carrying at least one prior ticker.