(Bloomberg) -- BlackRock Inc. clients jumped into its long-term funds in the fourth quarter, adding $63 billion to ETFs and other products in a sign investors put cash to work as stock and bond markets surged.Most Read from BloombergGoogle Lays Off Hundreds in Hardware, Assistant, EngineeringUS and UK Strike Yemen’s Houthis After Red Sea Ship AttacksHertz to Sell 20,000 EVs in Shift Back to Gas-Powered CarsUK’s Sunak Authorizes Joint Military Strikes With US Against HouthisBlackRock Buys Infrast