Shares in the Swiss lender plunged more than 30% at one point on 15.3.2023 to a record low of about 1.56 Swiss francs (£1.40) a share, after its top shareholder, the Saudi National Bank (SNB), ruled out providing it with fresh funding because of regulations that cap its stake – now 9.9% – at 10%.

That compounded panic about potential weaknesses across a global banking sector still reeling from SVB’s collapse as well as fears over continuing problems at the Swiss lender, which as Europe’s 17th largest lender by assets is far larger than SVB and deemed systemically important to the global financial system.