Mid Cap Active runners: SandRidge Energy (NYSE:SD), Advanced Micro Devices (NYSE:AMD), Oi SA (ADR) (NYSE:OIBR), Yamana Gold (NYSE:AUY)

In November 2012, SandRidge Energy Inc. (NYSE:SD) cut its reserve predictions to the equivalent of 422,000 barrels per well from 456,000 barrels. Five months later, the estimate was cut again, to 369,000 barrels, company records show. SandRidge Energy Inc. (NYSE:SD) has since made a small adjustment upward to 380,000 barrels.  SandRidge Energy Inc. (NYSE:SD) stock performance was 2.19% in last session and finished the day at $6.53. Traded volume was 12.34million shares in the last session and the average volume of the stock remained 9.40million shares. The beta of the stock remained 2.82. SandRidge Energy Inc. (NYSE:SD) insider ownership is 0.60%.

Advanced Micro Devices, Inc. (NYSE:AMD) Senior Vice President and General Manager, Global Business Units, Lisa Su has been named a winner in the EE Times and EDN 2014 UBM Tech ACE Awards in the Executive of the Year category. The awards program honors the people and companies behind the technologies and products that are changing the world of electronics. Advanced Micro Devices, Inc. (NYSE:AMD) dropped -1.48 percent to $4.00 Thursday on volume of 16.80million shares. The intra-day range of the stock was $3.97 to $4.10. Advanced Micro Devices, Inc. (NYSE:AMD) has a market capitalization of $2.90billion.

Oi S.A. (ADR) (NYSE:OIBR) hereby announces to its shareholders and the market in general that it filed the preliminary prospectus supplement relating to the Offering (as defined below) with the U.S. Securities and Exchange Commission on the date hereof. The Offering may initially consist of 1,917,028,657 common shares and 3,834,057,315 preferred shares, totaling 5,751,085,972 shares, including shares in the form of American Depositary Shares, represented by American Depositary Receipts (the “Offering”). Oi SA (ADR) (NYSE:OIBR)’s stock on Apr 03, 2014 reported a increase of 1.47% to the closing price of $1.38. Its fifty two weeks range is $1.29 -$3.05. The total market capitalization recorded $2.26billion. The overall volume in the last trading session was 9.80million shares. In its share capital, OIBR has 1.64billion outstanding shares.

Yamana Gold Inc. (USA) (NYSE:AUY) was upgraded by analysts at Davy Research from a “neutral” rating to an “outperform” rating in a research report issued to clients and investors on Thursday. On Thursday, shares of Yamana Gold Inc. (USA) (NYSE:AUY) dropped -0.70% to close the day at $8.55. Company return on investment (ROI) is -5.60% and its monthly performance is recorded as -16.18%. Yamana Gold Inc. (USA) (NYSE:AUY) quarterly revenue growth is -4.36%.