Execution IDs
The 1st character of an Execution ID (after converting to a 9 character base 36 number zero-padded on the left) may be used to differentiate between internal matched trades, internal auction fills, and routed trades as follows:
- 0 (zero) = Cboe Internal Match
- 1 = Cboe Internal Match (C1 Options Only)
- 2 = Cboe Internal Match (C1 Options Only)
- C = Auction Fill (Equities Only)
- M = Cboe Market Close Trade
- P = Periodic Auction Trade (BYX Only)
- R = Routed Trade