WASHINGTON — Jerome H. Powell is likely to face more than the typical questions about the Federal Reserve’s latest interest rate decision on Wednesday. The central bank chair will almost certainly be grilled about how and why his institution failed to stop problems at Silicon Valley Bank before it was too late.The collapse of Silicon Valley Bank, the largest bank failure since 2008, has prompted intense scrutiny of the Fed’s oversight as many wonder why the bank’s vulnerabilities were not promptly fixed.Many of the bank’s weaknesses seem, in hindsight, as if they should have been obvious to its regulators at the Fed. An outsize share of its deposits were over the $250,000 insurance limit, making depositors more likely to flee at the first si …
