The Swiss government on Friday proposed stricter rules for UBS following its takeover of Credit Suisse, which could make it hold $26 billion more in core capital, confirming some of the bank's worst fears about incoming new regulations.

The Swiss government has proposed increasing UBS’s capital requirements by up to $18bn in an attempt to reduce the risk of another Credit Suisse-style collapse, a move UBS previously called “extreme” and “excessive”.

The Swiss government proposed strict new capital rules that would require banking giant UBS to hold an additional $26 billion in core capital. The measures would also mean that UBS will need to fully capitalize its foreign units and carry out fewer share buybacks.