SWIFT ISO 15022 - Code STCG Financial acronyms The entire acronym collection of this site is now also available offline with this new app for iPhone and iPad. Meaning Short Term Capital Gain: Short term capital gain. Usages Message type Field number Tag MT564 (Corporate Action Notification) 64 92a (Rate) MT564 (Corporate Action Notification) 95 92a (Rate) MT566 (Corporate Action Confirmation) 45 92a (Rate) MT566 (Corporate Action Confirmation) 85 92a (Rate)