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The dangers and the benefits of high speed financial market trading by computers. It has been blamed for an episode now known as the flash crash, in New York in 2010, and there have been other examples. A new report for the British government has been looking at the issue. The government's Chief Scientific Adviser Sir John Beddington says that regulation can reduce, but not eliminate those risks. He says there are benefits - computer based trading can help the functioning of markets.

And Cindy Sui reflects on her own experience of looking for a home in Taipei and sheds a rather unflattering light on Taiwan's property market.