SHARES in the world’s top platinum and palladium producers, Anglo American Platinum (Amplats) and Impala Platinum Holdings stumbled on Friday on news Russia planned to resume platinum group supplies. Platinum on Friday was fixed at $715,00 an ounce after hitting an all-time high of $735,00 on Thursday, while platinum was fixed at $537,00 an ounce. Russia has stopped exporting palladium in recent weeks and has not officially exported platinum for over a year in the absence of legislation allowing its exports. Prices have soared as a result.