http://www.thefiscaltimes.com/Articles/2013/04/16/Suspicious-Options-Trades-Draw-Regulators-Attention.aspx#page1

http://www.futuresmag.com/2013/04/16/regulators-report-to-finance-ministers-central-ban

http://online.wsj.com/article/SB10001424127887324345804578426771023748416.html?mod=wsj_streaming_stream#

http://www.businessweek.com/news/2013-04-16/oil-options-slip-from-three-month-high-as-futures-slow-descent

http://blogs.wsj.com/moneybeat/2013/04/16/despite-vix-jump-options-investor-profits-big-on-vxx-decay/

http://www.bloomberg.com/news/2013-04-16/bloomberg-lp-sues-u-s-cftc-over-swap-collateral-rules.html

http://www.bloomberg.com/news/2013-04-16/u-s-stock-options-with-biggest-changes-in-implied-volatility.html?cmpid=yhoo

http://online.barrons.com/article/SB50001424052748703318404578426632445631280.html?mod=BOL_options_home

http://blogs.barrons.com/stockstowatchtoday/2013/04/16/why-its-too-early-to-worry-about-a-crash/?mod=yahoobarrons

https://theoptionsinsider.com/education/?p=100013214&qcABC=1

http://stream.marketwatch.com/story/markets/SS-4-4/SS-4-27925/

http://www.cnbc.com/id/100645848