工具 API

get_symbol_change_history

Get ticker symbol change history -- tracks when US stocks changed their ticker symbol or company name. Returns old symbol, new symbol, company name, exchange, and effective date. Data available from 2022-07-22, US exchanges only. Use when the user asks about ticker renames, symbol changes, rebranding events, or needs to map old tickers to new ones. This is the only tool for symbol/ticker change tracking.