The proposed all-share deal between Switzerland's two biggest banks is set to be signed as soon as Sunday evening, the report said, adding that the deal will be priced at a fraction of Credit Suisse's closing price on Friday. An offer was made on Sunday morning with a price of 0.25 Swiss francs ($0.27) a share to be paid in UBS stock, the newspaper said, citing people familiar with the matter. UBS has also insisted on a 'material adverse change' that voids the deal in the event its credit default spreads jump by 100 basis points or more, the report added.