First Commerce Corp.'s adoption of antitakeover provisions was probably not spurred by any immediate hostile action but rather by a desire to protect the New Orleans-based bank during a period of earnings weakness, analysts said.

First Commerce, Louisiana's largest bank, announced this week that its board had adopted a 10-year shareholder rights plan, or "poison pill," allowing current holders to buy shares of the company at half market value whenever an acquirer buys 10% or more of the company.

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