GT Advanced Technologies Inc (NASDAQ:GTAT)’s shares are up 7.73% to $15.90 following a report in ETNews.com that said sapphire is beginning to be used as Smartphone cover glass in earnest, and that growth of related downstream industries is anticipated. GT and Rubicon both make sapphire components. Rubicon shares are up 6.68% to $7.99.Sapphire is considered more durable than tempered glass. GT Advanced Technologies Inc (NASDAQ:GTAT) stock performance was 8.10% in last session and finished the day at $15.95. Traded volume was 10,222,199 shares in the last session and the average volume of the stock remained 9.57 million shares. The beta of the stock remained 1.68. GT Advanced Technologies Inc (NASDAQ:GTAT) insider ownership is 0.60%.

Rubicon Technology, Inc. (NASDAQ:RBCN) was upgraded by analysts at Oppenheimer from an “underperform” rating to a “market perform” rating in a research report issued to clients and investors on Friday,TheFlyOnTheWall.com reports. Rubicon Technology has a 1-year low of $6.93 and a 1-year high of $14.67. Rubicon Technology (NASDAQ:RBCN) last issued its quarterly earnings data on Thursday, May 1st. The company reported ($0.43) EPS for the quarter, missing the Thomson Reuters consensus estimate of ($0.33) by $0.10. The analysts noted that the move was a valuation call. Rubicon Technology, Inc. (NASDAQ:RBCN) rose 5.87 percent to $7.93 yesterday on volume of 1,279,309 shares. The intra-day range of the stock was $7.78 to $8.23. Rubicon Technology, Inc. (NASDAQ:RBCN) has a market capitalization of $207.42 million.

Yingli Green Energy Hold. Co. Ltd. (ADR) (NYSE:YGE) surged Thursday after the company announced the trial production of a new piece of technology. The solar energy company announced the start of production of monocrystalline silicon modules with N-type Metal-Wrap-Through, or “N-MWT,” technology with assistance from Formula E s.r.l. Forumla designed and produced manufacturing equipment, which was installed in one of Yingli’s module workshops, as part of the two companies’ strategic collaboration agreement. Yingli Green Energy Hold. Co. Ltd. (ADR) (NYSE:YGE)’s stock on May 23, 2014 reported an increase of 0.90% to the closing price of $3.38. Its fifty two weeks range is $2.65 -$8.77. The total market capitalization recorded $614.36 million. The overall volume in the last trading session was 6,902,418 shares. In its share capital, Yingli Green Energy Hold. Co. Ltd. (ADR) (NYSE:YGE) has 181.68 million outstanding shares.

LDK Solar Co., Ltd (ADR) (OTCMKTS:LDKSY) in provisional liquidation and its Joint Provisional Liquidators, Tammy Fu and Eleanor Fisher, both of Zolfo Cooper (Cayman) Limited, announced on April 29, 2014 that its Chinese Subsidiary, Jiangxi LDK Solar Hi-Tech Co., Ltd. (“Jiangxi LDK Solar”), has signed a wafer supply agreement with Gintech Energy Corporation, a Taiwanese company listed on the Taiwan exchange with solar cell manufacturing operations. Under the terms of the agreement, Jiangxi LDK Solar will provide wafers totaling 850 megawatts with shipments commencing in April 2014 through March 2018. LDK Solar Co., Ltd (ADR) (OTCMKTS:LDKSY)’s stock on May 23, 2014 reported an increase of 1.20% to the closing price of $0.420. Its fifty two weeks range is $0.10 -$2.16. The total market capitalization recorded $81.68 million.

Suntech Power Holdings Co., Ltd. (ADR) (OTCMKTS:STPFQ) announced that the administrator of Suntech Power International Ltd. (“SPI”), the Company’s principal operating subsidiary in Europe, has called for a meeting of the creditors of SPI on June 10, 2014 to consider a proposed dividend agreement to resolve the claims of SPI’s creditors. Under Swiss law, such agreement would be approved if either the majority of creditors by number representing two-thirds of the claim amounts or one-fourth of creditors by number representing at least three-fourths of the claim amounts consent to such agreement. In the event SPI’s creditors approve the agreement, such agreement is also subject to final approval by the court in Schaffhausen, Switzerland. Suntech Power Holdings Co., Ltd. (ADR) (OTCMKTS:STPFQ) stock on May 23, 2014 reported a decrease of 1.72% to the closing price of $0.303. Its fifty two weeks range is $0.28 -$1.93. The total market capitalization recorded $54.79 million.