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Decisions made in Washington can affect your portfolio every day but what policy changes should investors be watching?
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Welcome to The Inquiry from the BBC World Service.
I'm Tanya Beckett.
Each week, one question, four expert witnesses and an answer.
The European Union has banned the purchase, import and transfer of gold from Sudan, one of Africa's biggest producers.
Gold has become a key source of financing for the country's
civil war that has forced more than 14 million people from their homes.
And the underlying reason is its price.
In the last 20 years, the value of gold on the international market has multiplied by a factor of five.
Traditionally seen as a safe haven,
the precious metal has been riding a wave of global uncertainty and worries about inflation.
For investors, mining companies and even central banks who have large holdings of the metal,