SWIFT ISO 15022 - Code BCSH Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Buy Contra Short: Order to buy contra short. Usages Message type Field number Tag MT502 (Order to Buy or Sell) 18 22a (Indicator) MT513 (Client Advice Of Execution) 35 22a (Indicator) MT576 (Statement of Open Orders) 43 22a (Indicator)