the tour himism. isa soares reporting live from athens. many thanks to you. china s markets are in the third week of volatile trading. committing brokerages to buying billions worth of stocks. here s a look at the numbers. we ll bring those up if we can. the shanghai composite up 5.44%. the shenzhen composite up 3.77%, very different to the numbers we were looking at 24 hours ago. although stocks have moved into that positive territory, there are still major concerns about what this slide says about the world s second largest economy. david mckenzie takes a closer look at the potential impact. reporter: some say the bubble has burst. some say it s a stock market