http://www.tradersmagazine.com/news/people/ex-state-street-executives-charged-with-imposing-hidden-fees-115184-1.html

http://blogs.wsj.com/moneybeat/2016/04/05/fear-gap-grows-between-u-s-and-european-markets/

http://www.wsj.com/articles/ally-financial-to-buy-online-broker-tradeking-group-for-275-million-1459871187

http://www.cboeoptionshub.com/

http://www.bloomberg.com/news/articles/2016-04-05/bats-grows-up-seeks-redemption-in-its-second-attempt-at-an-ipo

http://www.wsj.com/articles/bats-global-markets-not-planning-to-sell-stock-in-ipo-1459769669

https://theoptionsinsider.com/march-2016-options-exchange-marketshare-review/

http://www.wisconsinagconnection.com/story-national.php?Id=732&yr=2016

http://www.fxstreet.com/analysis/know-your-options/2016/04/04/

http://www.bloomberg.com/news/articles/2016-04-04/treasuries-volatility-plunges-as-interest-rate-outlooks-converge

http://www.foxbusiness.com/markets/2016/04/04/tradeking-wins-options-insider-broker-madness.html

http://www.afr.com/markets/equity-markets/resilience-of-us-equities-blindsides-sophisticated-traders-20160404-gnydgp