[Exxy]

I'm not sure if this is meant to be there, or what it's supposed to be if it was previously something else, or if on my character it's just a null value for x reason that I don't currently meet the requirements for but seriously, what is it (for reference, I highlighted it before taking the picture and drawing an arrow to it):

EDIT: This seems to be on all types of 'Wearable' Items.