Finra Rule 4511 is the general recordkeeping rule for broker-dealers. Generally speaking, it is know as the “books and records” rule because it notes that you must make and preserve all books and records required by Finra, U.S. Securities Exchange Act of 1934 (“the Exchange Act”), and applicable SEC rules. If there is no retention period noted elsewhere, you must keep records for at least six years. All required books and records must be stored in a format and media that comply with SEC Rule 17a-4, which governs electronic keeping.