ST. GALLEN, Switzerland, May 6 (Reuters) – UBS CEO Sergio Ermotti on Wednesday said the Swiss bank needs to ‌broaden its business in the United States as he ‌pledged to prepare for any scenario that could emerge from a parliamentary debate ​on proposed tougher capital rules for the lender.

Speaking in the Swiss city of St. Gallen, Ermotti vowed to work until the “last minute” to ensure UBS and Switzerland kept benefiting from each other ‌amid speculation the bank ⁠could move its headquarters abroad if it found the new rules too onerous.

UBS in March secured ⁠a national banking licence in the United States, and Ermotti said expanding in the United States did not necessarily need to ​be via ​an acquisition.

“We may have to ​do an acquisition. We may ‌want to do an acquisition,” he said at the St. Gallen Symposium. “I don’t know about any big organization that can rule out acquisitions.”

The government sent a bill to parliament last month that would make foreign expansion dearer for UBS. Swiss lawmakers ‌decided on Monday to review alternative ​options for the proposed new capital ​rules, putting off a ​swift decision on the matter.

Lawmakers are due to ‌continue debating the capital bill in ​August, likely meaning ​it will not face a vote by the full upper chamber of parliament before September.

“I’m focused on one option, ​making UBS strong ‌out of Switzerland,” Ermotti said, adding the bank has ​a fiduciary duty to prepare for any scenario.

(Reporting by ​Ariane LuthiEditing by Dave Graham)