SWIFT ISO 15022 - Code GTNM Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Good until the End of Next Month: Order that, if not executed, expires at the end of next month. Usages Message type Field number Tag MT502 (Order to Buy or Sell) 18 22a (Indicator) MT576 (Statement of Open Orders) 43 22a (Indicator)