As many as 12,000 UBS in Switzerland could be at risk if tougher capital rules prompt the bank to relocate, according to the Swiss Bank Employees Association, or SBPV.
UBS shares have entered a technical correction, falling more than 12% from their high for the year. The stock dropped to 39 francs after peaking at 45 francs in August.
A committee in Switzerland's upper house of parliament on Tuesday backed a government plan to create a public liquidity backstop for systemically important banks that would levy a fee on UBS to access it.
UBS CEO Sergio Ermotti said France needs “hard measures” to restore fiscal credibility. French bond yields have risen sharply in recent weeks, as fears growing over its debt burden.