NEW YORK (TheStreet) -- Rockwood Holdings Inc. (ROC) was upgraded to "buy" from "neutral" at Goldman Sachs (GS) - Get Report on Friday.

The firm said it raised its rating on the company, which develops, manufacturers, and markets specialty chemicals and advanced materials used for industrial and commercial purposes, as Rockwood's recent weakness has created a buying opportunity.

STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.

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STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.