The 1993 SNA (11.79, 11.80 and 11.81) recommends an optional subclassification of transactions in securities other than shares by maturity into short-term (F.31) and long-term (F.32). However, the 1993 SNA (11.82) provides for an additional optional subclassification of transactions in securities other than shares showing transactions in financial derivatives separately where they are important from the point of view of analysis and policy. This second option is adopted in the ESA. It also facilitates the linkage to the sub-category debt securities as defined in the 1993 Balance of Payments Manual, which divides debt securities into bonds, notes, money market instruments and financial derivatives. The codes F.31 and F.32 are not used in the ESA to avoid confusion with the 1993 SNA codes.