Question juridique clé
Whether the arbitral tribunal lacked jurisdiction over Y. Banka because it was not bound by the arbitration clause in the shareholders' agreement.
Solution extraite
The tribunal correctly held that Y. Banka was not bound by the arbitration agreement and therefore lacked jurisdiction over the claim against it.
Motifs extraits
The bank was not named in the written agreement, was not validly represented by its officer when the agreement was signed, and the appellant failed to prove any clear conduct showing a consensual extension of the arbitration clause to the bank.