The OP's question asks what the act is from Joe's perspective, but from the comments I get that the noun is also wanted.
As far as the verb goes, Joe either lends or loans you the money.
to grant the use of (something) on condition that it or its equivalent
will be returned.
verb (used with object)
to make a loan of; lend: Will you loan me your umbrella?
to lend (money) at interest.
verb (used without object)
to make a loan or loans; lend.
The noun, what is being lent/borrowed is a loan from both persectives, a loan being money that both parties agree should be returned to the lender.
the act of lending; a grant of the temporary use of something: the loan of a book.
something lent or furnished on condition of being returned, especially a sum of money lent at interest: a $1000 loan at 10 percent