Among the stock activity stories for Friday, Oct. 5, from AP Business News:
— Shares of business software maker Informatica Corp. made a small rebound after losing more than 20 percent of their value a day earlier following the company's disappointing third-quarter forecast.
— Shares of Sunesis Pharmaceuticals Inc. rose after the company discussed plans for an upcoming trial of its cancer drug vosaroxin.
— Shares of data services company Neutral Tandem Inc. fell to a new low as R.W. Baird analysts downgraded the company's rating, saying its financial performance has weakened more than expected.
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