http://www.reuters.com/article/2013/05/01/hedgefunds-volatility-idUSL2N0DB20320130501

http://allfacebook.com/options-traders-lukewarm_b116269

http://blogs.wsj.com/moneybeat/2013/05/01/cftc-commissioner-proposes-derivatives-transaction-fee/

http://www.marketwatch.com/story/how-a-harlem-shake-shook-wall-street-2013-04-30

http://in.reuters.com/article/2013/05/01/hft-regulation-twitter-idINDEE94000520130501

http://www.bloomberg.com/news/2013-04-30/exchanges-win-dismissal-of-market-data-pricing-rule-case.html

http://blogs.marketwatch.com/thetell/2013/04/30/will-it-take-a-big-hack-to-goose-the-vix-back-to-life/

http://www.bloomberg.com/news/2013-04-30/u-s-stock-options-with-biggest-changes-in-implied-volatility.html?cmpid=yhoo

http://online.barrons.com/article/SB50001424052748703591404578454933615145970.html?mod=BOL_da_spd

http://blogs.wsj.com/moneybeat/2013/04/30/options-investors-bet-facebook-shares-have-lost-their-bang/?mod=yahoo_hs

http://blogs.wsj.com/moneybeat/2013/04/30/derivatives-help-mask-equities-pain-at-nyse-euronext/

http://online.barrons.com/article/SB50001424052748703591404578452681618149330.html?mod=BOL_options_home