http://www.reuters.com/article/2015/04/22/us-flashcrash-trader-idUSKBN0ND17220150422

http://www.automatedtrader.net/headlines/153659/rough-volatility-new-research-helps-traders-hone-their-edge

http://blogs.wsj.com/moneybeat/2015/04/22/options-traders-betting-facebook-will-climb-after-earnings/

http://www.wsj.com/articles/cme-says-prohibited-from-releasing-info-about-any-individuals-trading-1429734205

http://www.automatedtrader.net/headlines/153657/flash-crash-arrest-ignites-industry-scepticism

http://www.automatedtrader.net/news/at/153648/can-bank-stock-options-tell-us-about-the-future-of-the-economy

http://www.bloomberg.com/news/articles/2015-04-21/hedge-fund-push-on-swaps-trades-hits-snag-with-cftc-s-giancarlo

http://www.bloomberg.com/news/articles/2015-04-22/infosys-s-option-costs-rise-to-18-month-high-before-earnings

http://www.dnaindia.com/money/report-nse-retains-top-slot-in-global-index-options-trade-2079464

http://www.wsj.com/articles/lse-likely-to-do-deal-with-rival-exchange-within-two-years-1429701017

http://www.bloomberg.com/news/articles/2015-04-21/spreadsheet-gumption-were-all-u-k-trader-needed-to-rig-market

http://www.businessinsider.com/navinder-saroa-supposedly-told-cme-to-kiss-his-a–2015-4