Can be used for SecurityType=OPT to identify a particular security. Valid values vary by SecurityExchange: For Exchange: MONEP (Paris) L = Long (a.k.a. “American”) S = Short (a.k.a. “European”) For Exchanges: DTB (Frankfurt), HKSE (Hong Kong), and SOFFEX (Zurich) 0-9 = single digit “version” number assigned by exchange following capital adjustments (0=current, 1=prior, 2=prior to 1, etc).