UBS CEO Ermotti warns against strict capital rules ahead of crucial Swiss vote

Sergio Ermotti has a message for Swiss lawmakers: push too hard, and you might push UBS out the door.

The UBS CEO used an interview with Neue Zürcher Zeitung on September 20 to fire a warning shot at Switzerland’s upper parliament, which is set to vote around September 23 on new capital rules that could require the bank to hold roughly $20 billion in additional Common Equity Tier 1 capital. That kind of money doesn’t come cheap, and Ermotti made clear that the bill wouldn’t land exclusively on shareholders’ desks. Customers and employees would feel it too.

The Credit Suisse hangover

The proposed regulations trace directly back to the 2023 collapse of Credit Suisse, which UBS absorbed in a government-brokered rescue deal that created a banking giant with a balance sheet rivaling Switzerland’s entire GDP. Swiss politicians, understandably spooked by the idea of having to backstop another too-big-to-fail institution, have been working on rules designed to ensure UBS can absorb losses from its foreign subsidiaries without dragging the Swiss taxpayer into the wreckage.

The government’s original proposal is straightforward but severe: require 100% CET1 capital backing for foreign subsidiaries. Ermotti called the proposal overly harsh. His argument is that Switzerland would be imposing capital standards significantly stricter than those required in other major financial centers, putting UBS at a competitive disadvantage against Wall Street and European rivals who operate under lighter regimes.

A parliamentary committee has floated a compromise that would let UBS meet half of the foreign subsidiary capitalization requirement using Additional Tier 1 bonds instead of pure CET1 capital. AT1 bonds are a cheaper form of capital for banks because they pay interest (unlike equity) but can be written down or converted to equity if the bank hits trouble. Under this softer framework, UBS would still need to raise an estimated $13 billion in additional capital, a significant but more manageable figure than the full $20 billion.

The implicit threat

What makes this fight unusual is how openly UBS is telegraphing its willingness to walk. Ermotti’s comments were notable, but Chairman Colm Kelleher has gone further, warning that UBS may reconsider its future in Switzerland entirely if the capital requirements undermine competitiveness.

What investors are watching

The September 23 vote has become a focal point for anyone with exposure to European banking stocks. The difference between the government’s full CET1 proposal and the committee’s AT1 compromise amounts to roughly $7 billion in capital requirements, a gap large enough to materially affect UBS’s return on equity, dividend capacity, and share buyback programs.

If the stricter version prevails, UBS would face pressure to either raise substantial new equity, diluting existing shareholders, or redirect profits away from distributions and into capital buffers for years. The AT1 compromise, while still costly, would preserve more flexibility. The European AT1 market, which briefly seized up after Credit Suisse’s AT1 holders were wiped out in the 2023 rescue, has since stabilized, meaning UBS could likely access it without paying punitive rates.

There’s also a leadership dimension that investors shouldn’t ignore. Ermotti’s tenure as CEO had been widely expected to wind down in the near term, but the regulatory uncertainty has reportedly prompted a reconsideration of that timeline.

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