The base rules say :
An investigator in the same street area, Other World
area, or location as another investigator may trade
money, Common Items, Unique Items, and Spells. This
may be done before, during, or after movement, but not
during combat.
The FAQ says:
Miscellaneous
Q: Exactly where, when, and what can investigators
trade?
A: Investigators may trade any time they are in the same
location except during combat. They may trade before,
during or after movement, which means trading does not
end a move.
They may trade Common Items, Unique Items, Money,
and Spells. They may not trade Clue tokens, Allies, and
Monster and Gate trophies.
Based on a strict reading, it seems like I could read my encounter card, and then say to someone on my space "oh hey, let me borrow that item".
It reads like they MEAN you can only trade during movement, but I can't find anywhere that says that.
Any thoughts?
Also, I always play that you can trade exhibit items too, but afaik that isn't spelled out anywhere.