The second clause said that if any country finds it cannot raise funding for the rescue at interest rates below the 5pc charge agreed for Greece, it may opt out of the bail-out. BNP Paribas said this would escalate quickly into a systemic crisis if Spain were in such a position, because the other countries cannot carry an ever-rising burden. The bank warned the euro project itself may start to disintegrate rapidly if these rescue provisions are ever seriously put to the test.