UPDATE 3-South Africa's Sibanye-Stillwater buys troubled platinum miner Lonmin By: Reuters: Company News December 14, 2017 at 07:32 AM EST * Lonmin underperforms peers: http://bit.ly/2zbL36M (Adds Lonmin CEO comment, Sibanye plans for merged firm) Read More >> Related Stocks: Gold Fields Ltd ADR Mobile Platforms