transactions otherwise than on a national securities exchange effected by use of the mails or any means or instrumentality of interstate commerce by any member of a national securities exchange, broker, or dealer for the account of such member, broker, or dealer (unless such member, broker, or dealer is acting in the capacity of a market maker)
1
So in original. Probably should be followed by a comma.
the account of an associated person, or an account with respect to which such member, broker, or dealer or associated person thereof exercises investment discretion; and