Advanta Corp.'s stock rose sharply Friday amid rumors the eighth- largest credit card issuer had found a buyer.

Advanta's A shares rose $1.625, to $31.125, by early afternoon, while its B shares jumped $1.50, to $29, on a day when bank stocks were soaring. The firm has been working since last summer with acquisitions specialist BT Wolfensohn and is thought to be worth at least $1 billion.

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