OCZ Technology Group Inc.(NASDAQ:OCZ) shares decreased 9.92% to $1.18. The company, on May 8, announced that its new ZD-XL SQL Accelerator has earned the Best of Interop� award in the Data Center & Storage category.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) shares fell 5.50% to $4.47. The Board of Harmony Gold Mining Company Limited ("Harmony") on May 6 announced the appointment of Karabo Nondumo as Director of the Company, effective 3 May 2013.

Harmony Gold Mining Co. (ADR)(NYSE:HMY)declined 4.94% and closed at $4.62 on a traded volume of 3.33 million shares.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) surged up 13.20% and closed at $5.23 on a traded volume of 5.52 million shares.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) surged up 13.20% and closed at $5.23 on a traded volume of 5.52 million shares.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) traded -0.73% lower to close at $4.08. The stock closed at a distance of -13.39% from 20-day simple moving average.

Pain Therapeutics, Inc. (NASDAQ:PTIE) stock plunged 48.12% to $2.76. The company on May 10 announced that it received correspondence from Pfizer, Inc. (NYSE:PFE).

Harmony Gold Mining Co. (ADR) (NYSE:HMY) shares fell 5.50% to $4.47. The Board of Harmony Gold Mining Company Limited ("Harmony") on May 6 announced the appointment of Karabo Nondumo as Director of the Company, effective 3 May 2013.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) shares climbed 9.49% to $4.73. The Board of Harmony Gold Mining Company Limited ("Harmony") on May 6 announced the appointment of Karabo Nondumo as Director of the Company, effective 3 May 2013.

Harmony Gold Mining Co. (ADR) (NYSE:HMY) shares gained 5.60% to $4.90. The 52 week trading range for the company is $4.59 - $10.73.