International Business Machines Corporation (NYSE:IBM) has announced it will acquire DemandTec,Inc (NASDAQ:DMAN) for $440 million, sending shares of DMAN up 57% yesterday to $13.20 on volume of 35 million shares. DMAN received Stockdiagnostics' highest rating of a 1 when the company was upgraded on July 14, after reporting it's fourth consecutive positive Operational Cash Flow (OPS) quarter.

Since the July upgrade @ $7.75, shares are up $5.45 or 70% in less than 5 months.

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