Citing the need for regulatory approvals, Arcelor SA is extending the deadline on its CDN 71-a-share offer to Dofasco Inc. shareholders until 20 February. The takeover bid had been set to expire 9 February. Luxembourg-based Arcelor, the world’s second-biggest steelmaker, said the extension is being made “in order to allow for sufficient time to obtain the required regulatory approvals.” The deal requires support from stockholders holding at least two-thirds of Dofasco’s shares.