Walmart shares plunge after disappointing results

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US retailer Walmart has announced a 42% drop in earnings, despite an increase in sales. We ask Bryan Roberts, author of a book about the retail giant, if it is losing the online battle with Amazon. India is to allow private firms to mine coal for commercial use. The BBC's Suranjana Tewari in Mumbai explains the background. Also in the programme, as Venezuela launches its own oil-backed cryptocurrency, our regular economic commentator Roger Bootle assesses the health of the cryptocurrency sector. We have a report from Spain on a flurry of corruption scandals that have been plaguing politics in the country. Picture: A sign hangs outside a Walmart store in Chicago, Illinois (Credit: Scott Olson/Getty Images).