Switzerland's upper house of parliament has thrown its weight behind a plan that would force UBS to hold significantly more top-quality capital against its foreign subsidiaries. The move is the latest twist in a long-running debate over how to regulate the country's largest bank after its emergency takeover of Credit Suisse in 2023.
The proposal, which still needs approval from the lower house and the government, would require UBS to fund 90% of its foreign units with Common Equity Tier 1 (CET1) capital, up from the current 60%. CET1 is the highest-quality capital a bank can hold—essentially shareholders' equity and retained earnings—because it is the first to absorb losses. It is also the most expensive form of capital for a bank to maintain, since it ties up money that could otherwise be lent out or returned to shareholders.
Why the fight over capital rules?
The roots of this dispute go back to March 2023, when UBS was pushed by Swiss authorities to buy its struggling rival Credit Suisse in a hastily arranged deal. That rescue created a banking giant with a balance sheet roughly twice the size of Switzerland's entire economy. For many lawmakers and regulators, that concentration of risk is a problem: if UBS ever ran into trouble, the Swiss state would be on the hook to bail it out, as it was for Credit Suisse.
To reduce that risk, Swiss regulators have been considering tougher capital requirements for UBS. The upper house's vote backs a stricter approach than the one UBS and business groups had lobbied for. In late August, a proposal had suggested meeting the requirement with a 50-50 split between CET1 and Additional Tier 1 (AT1) capital—a lower-quality, cheaper form of debt that can be written down in a crisis. The upper house rejected that compromise, insisting on the higher-quality CET1.
UBS has pushed back, arguing that such a rule would be excessive and would hurt its competitiveness. The bank has said the plan could add around $16 billion to its capital buffer, money that would otherwise be used for lending or returned to investors. That figure was cited in UBS's own estimate of the plan's impact.
What does this mean for investors?
For everyday investors, the key takeaway is that UBS may be forced to hold more capital, which could affect its profitability and how much it can return to shareholders. Banks make money by lending out deposits and other funds; the more capital they must set aside, the less they have to deploy. That can squeeze profit margins and reduce the amount available for dividends or share buybacks.
But there is a flip side. A better-capitalized bank is generally a safer bank. If UBS is required to hold more loss-absorbing capital, the risk of a future bailout—and the potential hit to the Swiss economy—declines. For investors, that could mean lower returns in exchange for lower risk.
The debate is far from over. The upper house's vote is a signal, but not the final word. The lower house of parliament and the Swiss government still have to weigh in. UBS is likely to continue lobbying against the strictest version of the rules, and the final outcome could be a compromise.
Investors should also keep an eye on how these rules might affect UBS's global operations. The bank has large businesses in the US, Asia, and elsewhere, and any requirement to fund those units with expensive capital could make them less profitable. That could influence where UBS chooses to allocate its resources in the future.
For now, the immediate reaction in the markets has been muted, but the issue is a reminder that UBS's fate is closely tied to Swiss politics. As the country's largest bank, its regulatory environment is a key factor for anyone holding its stock or bonds.
Related coverage: UBS's fight against the capital plan and other corporate news.
