Platinum prices have risen sharply over the past 10 days to their highest in over a decade as a surge in gold and silver prices has exacerbated existing supply tightness and steady demand. Specialty chemicals company Johnson Matthey assessed platinum at $1,608/t on 29 September, up by 15pc since 19 September, when the price started rising sharply after slower but significant gains in the second quarter. Platinum has now reached the highest in 11 years and is up by 72pc this year. The recent price increase has been a "sympathy rally", a senior industry executive said. Platinum prices have been lifted by runs in gold ... (full story)