Spherion Corporation (NYSE:SFN) shares jumped 26.5% after securities firm C.L. King upgraded the Fort Lauderdale, Fla.-based staffing company from “neutral” to “strong buy.” Spherion’s shares are currently at $5.78 up about $1.21 from Tuesday’s close. The stock reached its highest point in the past month.

The company’s shares have been between $4.48 and $9.77 during the past year.

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