Finova Group Inc. announced on Monday the immediate departure of its longtime chief executive officer, Samuel L. Eichenfield, and an $80 million charge that would leave its first-quarter earnings shy of projections, a pair of moves that stunned Wall Street and sent the company's stock price into freefall.

More trouble may be ahead, analysts said. Finova said it has about $50 million in exposure to two companies in the troubled health-care sector, but added that it was too early to tell whether it would have to write off those loans.

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