UBS is now 'the world's safest bank' for depositors because Switzerland has made it too big to fail, analyst says

• UBS' takeover of Credit Suisse for $3.2 billion makes it a depositor safe haven, Jaret Seiberg said.
• "The Swiss authorities have told everybody that this thing is too big to fail," he told CNBC.
• Unlimited deposit insurance is the "final act" to restore bank confidence but may not be needed yet, he added.

UBS has become depositors' most secure bet, TD Cowen's Jaret Seiberg told CNBC, after it agreed to take over Credit Suisse on Sunday.