X. GmbH v. Y. Corporation [The Ferrotitanium Supplies from Russia] No. 4A_452/2007 Headnote The interpretation and construction of arbitration agreements follow the general rules governing the interpretation and construction of contracts. Where two related agreements contain arbitration clauses providing for different kinds of arbitration, such clauses are binding on an arbitrator. An arbitrator appointed pursuant to the arbitration clause contained in one contract is therefore entitled to deny jurisdiction as to claims arising under another contract containing a different arbitration clause. An arbitrator has no duty to give reasons in his award on each and every point raised by either party in the course of the arbitration. Summary of the Decision Between 2000 and 2005 X. and Y. concluded (i) two exclusive contracts for the supply of ferrotitanium by Y. to X., and (ii) several multiple delivery contracts. The exclusive contracts were stated to be governed by Swiss law and referred any disputes arising thereunder to the jurisdiction of the courts of Zurich. The other contracts were stated to be governed by Russian law and contained a Moscow arbitration clause. In 2006 the parties agreed in a Supplement to the exclusive contracts that disputes arising out of or in connection with such contracts would be referred to arbitration under the Rules of International Arbitration of the Swiss Chambers of Commerce. X. brought an arbitration against Y. in Zurich seeking relief in relation to the exclusive contracts as well as the other contracts. The arbitrator declined jurisdiction with respect to the relief relating to the other contracts. X. brought setting aside proceedings against the award declining jurisdiction. The Supreme Court held that the interpretation and construction of arbitration agreements follow the rules of interpretation and construction applicable to contracts. In interpreting a contract, one must determine the contracting parties’ actual mutual intention, and, in the absence of actual intention or evidence in that respect, the parties’ presumed mutual intentions.