Bloomberg reported UBS Group AG and Credit Suisse Group AG would probably suffer substantial losses in a financial crisis, the Swiss National Bank said, lending weight to a government plan to impose bigger capital buffers.

Bloomberg said further, while Switzerland’s two biggest banks already meet most of the tougher capital requirements taking effect in 2019, they should “not lose momentum in their efforts to improve their resilience,” the central bank said Thursday in its annual report on financial stability, adding, “This is particularly warranted with regard to the leverage ratio.”

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