By Michael Shields ZURICH (Reuters) – Swiss bank UBS has agreed to buy U.S.-focused automated wealth management provider Wealthfront, which has more than $27 billion in assets under management, in an all-cash deal the two companies said was worth $1.4 billion. The acquisition of Wealthfront, which has more than 470,000 clients in the United States and caters to well-off millennial and Gen Z investors, is set to close in the second half of 2022. “UBS will accelerate its growth ambitions in the U.S., broaden the firm’s reach among affluent investors and expand its distribution and capabilities,”…