http://blogs.barrons.com/stockstowatchtoday/2015/01/23/are-investors-less-anxious-perhaps-not/

http://www.tradersmagazine.com/news/ecns_and_exchanges/batsdirect-edge-merger-officially-completed-113376-1.html

http://www.bloomberg.com/news/2015-01-23/high-frequency-probe-s-first-target-is-barclays.html?hootPostID=1e52a065de2204a0cd5c9fa81ecddcc3

http://www.bloombergview.com/articles/2015-01-23/high-frequency-trading-spoofers-and-front-running

http://www.tradersmagazine.com/news/foreign-exchange/high-speed-trading-fills-void-left-on-prop-desks-that-trade-fx-113371-1.html

http://www.fow.com/3419895/Options-traders-rue-lack-of-liquidity-report.html

http://dealbook.nytimes.com/2015/01/21/regulators-delve-into-too-big-to-fail-tag/?_r=0

http://www.reuters.com/article/2015/01/23/sgx-regulations-sgx-idUSL1N0V130C20150123

http://www.businessweek.com/news/2015-01-22/bloomberg-markets-strategies-trading-the-fear-index

http://www.sys-con.com/node/3281995

http://www.businessweek.com/news/2015-01-22/u-dot-s-dot-stock-index-futures-advance-on-ecb-stimulus-speculation

http://www.chicagotribune.com/news/sns-wp-blm-news-bc-cftc22-20150122-story.html#page=1