Last week ended with the worst day for bank stocks since the financial crisis of 2008. The collapse of Silicon Valley Bank, the country’s 16th largest banking firm and the lender of first resort for the start-ups of California’s tech world, has sparked fears of a larger bank run, or even a repeat of the systemic financial troubles. That’s the worst-case worries – but according to Goldman Sachs’ chief credit strategist, Lotfi Karoui, these fears may be overblown. “We think the risk of contagion f