http://www.nytimes.com/2016/04/30/business/dealbook/a-campaign-for-change-at-a-boutique-wall-street-firm.html?_r=0

http://www.lexology.com/library/detail.aspx?g=3a4a2d65-787d-418c-901f-131c788308c3

http://www.bloomberg.com/news/articles/2016-04-30/buffett-says-derivatives-time-bomb-may-elude-auditors-reviews

http://www.reuters.com/article/us-lse-m-a-ice-idUSKCN0XT09O

http://www.seeitmarket.com/stock-market-outlook-is-the-vix-signaling-trouble-investing-15613/

http://www.barrons.com/articles/some-options-traders-are-betting-big-on-sell-in-may-1461990806

http://tradinggods.net/trading-gods-blog/vix-daily-update-volatility-returns/

http://www.reuters.com/article/us-cme-group-spoofing-metals-idUSKCN0XP2TE

http://www.bloomberg.com/news/articles/2016-04-29/can-a-24-billion-hedge-fund-blow-the-whistle-citadel-thinks-so

http://www.bloomberg.com/news/articles/2016-04-29/unmasking-the-men-behind-zero-hedge-wall-street-s-renegade-blog

http://news.markets/shares/intercontinental-exchange-will-gate-crash-lsedeutsche-bourse-party-16647/

http://tickertape.tdameritrade.com/options/2016/04/delta-option-strikes-59757