(Bloomberg) -- Demand for a rarely used Federal Reserve facility rose to the highest level since 2020 this week, potentially signaling that one or more banks are making preparations for future liquidity strains as the central bank’s balance-sheet unwind deepens.Most Read from BloombergBiden Says He Might Not Have Sought Reelection If Trump Weren’t RunningGlobal Bonds Power Ahead as Dovish Bets Take Hold: Markets WrapApple Readies New iPads and M3 MacBook Air to Combat Sales SlumpKevin McCarthy L