Fields
The number on the right of each row is the protobuf field number.idint321
Unique id of the ticker.
tickerstring2
Ticker symbol, e.g. AAPL or SPXW.
Issue type (stock, etf, index, …). Absent when not yet classified.
first_time_options_todaybool4
True when options appear for this ticker for the first time, i.e. it had no other active (non-expired) chains loaded when this chain was created.
