WASHINGTON (AP) — After a frenetic weekend of round-the-clock briefings, U.S. policymakers took the audacious step of guaranteeing all the deposits of the failed Silicon Valley Bank — even those exceeding the Federal Deposit Insurance Corporation’s $250,000 limit. The hope is that it will restore confidence in the financial system after the second-biggest bank failure in U.S. history. The plan came together as the government was unable to sell off the defunct institution on time. But the FDIC may try to auction it off again. Meanwhile, policymakers and lawmakers are starting to look ahead for ways to prevent the next crisis.