主播大秀

On Business Matters today we count the cost of jihadist violence and hear about the increasingly sophisticated ways groups like Islamic State and Boko Haram raise money.

Russia's central bank has raised interest rates again as it desperately tries to stop its currency sliding. The country is suffering as the price of oil falls. We'll hear from Muscovites who are starting to feel the pinch.

We're also looking at those books you buy but never finish. Donna Tartt's Pulitzer-winning novel The Goldfinch, for example, was completed by less than half of the British readers who downloaded it.

Joining us on the show today - Eugene Puryear a political and environmental activist from Washington DC and Aaron Back, author of the Heard on the Street column for the Wall Street Journal in Hong Kong.