How does one write the possessive form of stock ticker symbols ending in "s"?
These are neither acronyms nor initialisms (/TLAs). For instance, does one write RAS' earnings, or RAS's earnings?
Katherine Fry and Rowena Kirton's grammar book Grammar for Grown-Ups says
Thus, RegDwighт's comment is correct -- but just notice the classical and historical case. BTW, as a non-native speaker, I am not clear when the 's' should be pronounced. For example, I saw Jobs's (in Isaacson's book Steve Jobs) and I can feel it weird if I don't pronounce the possessive 's'; however, I also saw Jobses', which conflicted with my feeling. So, is there any rule formulating when the possessive 's' should be pronounce? Thanks for all comments.
Abbreviations, acronyms, initialisms, alphabetisms, and all short forms of the type should be treated as such, and not as grammatical "words" of the language.
The singular exception is those that are no longer capitalized (not even initial capital) and pronounced as words.
In the first instance, always append and apostrophe-s for the possessive: RAS's.
In the case of the exceptions, apply the rules of punctuation treating it as any other word.
Do you know ichthys' origin?