 SALT LAKE CITY--BUSINESS WIRE--Zions Bancorporation, N.A. NASDAQ: ZION announced today that its board of directors board authorized an additional common share repurchase for the third quarter of 2021 of up to 200 million. The board had previously authorized 125 million for the third quarter; with todays authorization, the amount authorized is now up to 325 million, or approximately 3.5 of the companys current market capitalization. As of August 24, 2021, Zions had repurchased 98 