Tin prices slumped to two-month lows on Wednesday after major producer Alphamin Resources Corp said it was launching a phased resumption of operations at its Bisie mine in Democratic Republic of Congo. A month ago, Alphamin ceased operations at Bisie, which produces about 6% of global tin supplies a year, as Rwanda-backed M23 rebels advanced nearby, taking the strategic town of Walikale. The insurgents have now withdrawn from Walikale, more than 130 km (80 miles) to the east of Alphamin's mine, the company said in a statement on Wednesday. Prices of the soldering metal on the London Metal Exchange (LME) tumbled 8.3% ... (full story)