significant amounts of stock since the two Utah banking companies agreed in June to merge and Zions' shares have plummeted.

Shares of Zions, the acquirer, have dropped 22% since June 4, a Friday. The $5.9 billion deal was unveiled that Monday. First Security shares, which rose 19% the day the deal was announced, have fallen back to a 12% gain. In part, that reflects the general malaise in bank stocks in a climate of rising interest rates.

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