WASHINGTON — Silicon Valley Bank was growing steadily in 2018 and 2019 — and supervisors at its primary overseer, the Federal Reserve Bank of San Francisco, were preparing it for a stricter oversight group, one in which specialists from around the Fed system would vet its risks and point out weak spots.But a decision from officials in Washington halted that move.The Federal Reserve Board — which sets the Fed’s standards for banking regulation — was in the process of putting into effect a bipartisan 2018 law that aimed to make regulation less onerous for small and midsize banks. As the board did that, Randal K. Quarles, the Trump-appointed vice chair for supervision, and his colleagues also chose to recalibrate how banks were supervised in line with the new requirements.As a re …
