Among the stock activity stories for Tuesday, Oct. 6, from AP Financial News:

HARTFORD, Conn. (AP) ¿ Robbins & Myers Inc. shares fell a day after the equipment maker reported a 58 percent drop in quarterly profit and issued a disappointing outlook, as the recession continues to hurt sales across its businesses.

KALISPELL, Mont. (AP) ¿ Shares of Semitool Inc., which makes wafer-processing equipment for chip manufacturers, rose after it raised fourth-quarter revenue guidance and said bookings totaled $71.7 million, well ahead of recent periods.

NEW YORK (AP) ¿ Shares of American Reprographics Co. plunged after the company cut its earnings forecast for the year amid slumping revenue.

NEW YORK (AP) ¿ Shares of Zimmer Holdings Inc. fell after a UBS analyst downgraded the orthopedic implant maker, saying he does not think its sales growth will recover in 2009.

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