I'm assuming the "u" trade is an after hours trade...which normally isn't possible on the BB...the trades with a "t form" are as follows. could be "u" trade was a MM swap or something...
3) Transaction Reporting Outside Normal Market Hours
(A) Last sale reports of transactions in OTC Equity Securities executed between 8:00 a.m. and 9:30 a.m. Eastern Time shall be transmitted to the OTC Reporting Facility within 90 seconds after execution and shall be designated as ".T" trades to denote their execution outside normal market hours. Transactions not reported within 90 seconds must be designated as .T trades. Transactions not reported before 9:30 a.m. shall be reported after 4:00 p.m. and before 8:00 p.m. as .T trades.
(B) Last sale reports of transactions in OTC Equity Securities executed between the hours of 4:00 p.m. and 8:00 p.m. Eastern Time shall be transmitted to the OTC Reporting Facility within 90 seconds after execution; trades executed and reported after 4:00 p.m. Eastern Time shall be designated as ".T" to denote their execution outside normal market hours. Transactions not reported within 90 seconds must be designated as .T trades. Transactions not reported before 8:00 p.m. shall be reported on an "as of" basis the following day between 8:00 a.m. and 8:00 p.m.
