Platinum futures had the biggest gain in more than four months as a rise in South Africa’s rand spurred speculation that production costs will rise.
The rand led gains in emerging-market currencies as data showed South Africa’s economy expanded last quarter on a rebound in mining and factory output. The nation accounts for 73% of world platinum production, according to New York-based researcher CPM Group. Platinum has risen about 23% this year, trailing returns in silver and gold.
