<http://schema.org/url>
<http://blogs.wsj.com/marketbeat/2012/03/29/are-tvix-other-etns-wagging-the-tail-of-the-vix-dog/>
<http://blogs.wsj.com/marketbeat/2012/03/29/are-tvix-other-etns-wagging-the-tail-of-the-vix-dog/>