(Adds deal size)
By Sudip Roy and Helene Durand
LONDON, July 21 (IFR) - Tunisia has mandated JP Morgan and Natixis to manage a seven-year bond deal backed by the US AID agency, according to a lead manager.
Later in the day, the sovereign capped the deal size at USD500m, according to a source.
The deal is subject to market conditions, the lead said.
Tunisia is rated Ba3, B, BB-, but the note is expected to have the ratings of the US government, at Aaa, AA+, AAA. (Reporting by Sudip Roy and Helene Durand; editing by Anil Mayre)