http://www.tradersmagazine.com/news/options/ubs-exiting-us-automated-options-market-making-business-113734-1.html

http://www.cboeoptionshub.com/2015/04/19/vix-week-of-413-417/

http://online.barrons.com/articles/how-to-play-the-abercrombie-lbo-rumors-1429329994

http://www.chicagobusiness.com/article/20150416/NEWS01/150419872/chicago-trading-firms-vie-for-top-students

http://www.tradingfloor.com/posts/global-trouble-spots-will-fuel-volatility-4437869

http://www.cnbc.com/id/102598234

http://www.bloomberg.com/news/articles/2015-04-20/india-s-vix-heads-for-fifth-day-of-gains-as-stocks-extend-slide

http://leaprate.com/2015/04/did-cantor-fitzgerald-just-legalize-gambling-in-the-us-guest-editorial/

http://www.chicagobusiness.com/article/20150418/ISSUE01/304189991/occ-owners-want-dibs-on-half-the-pie

http://www.reuters.com/article/2015/04/17/us-celladon-options-idUSKBN0N82B620150417

http://finance.yahoo.com/news/wall-street-tumbles-hit-weak-173207538.html;_ylt=A86.JyWijDFVNlEA8NUnnIlQ

http://www.wsj.com/articles/ubs-exiting-u-s-automated-options-market-making-business-1429307272