SWIFT ISO 15022 - Code CLOS Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning At the Closing: Order to be executed at or around the closing price. 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)