When American International Corporation was forming, Kahn took an active part in the negotiations, and brought them to a successful issue. Kahn conducted negotiations which led to the opening of the doors of the Paris Bourse to American securities and the listing there of $50,000,000 Pennsylvania bonds in 1906, the first official listing of American securities in Paris. Also he had a large share later in the negotiations which resulted in the issue by Kuhn, Loeb and Company of $50,000,000 of City of Paris bonds and $60,000,000 Bordeaux-Lyons and Marseilles bonds.