http://www.efxnews.com/story/27825/risk-sentiment-not-too-hot-not-too-cold-analysts

http://www.bloomberg.com/news/articles/2015-02-05/treasuries-not-buying-stock-optimism-in-move-vix-spread-options

http://www.reuters.com/article/2015/02/05/cme-group-closure-savings-idUSL1N0VF29C20150205

http://www.cnbc.com/id/102401848

http://www.foxbusiness.com/markets/2015/02/05/homage-to-futures-pits/

http://www.cnbc.com/id/102401482

http://blogs.wsj.com/moneybeat/2015/02/05/options-traders-bet-on-smaller-than-usual-move-for-twitter-stock/

http://finance.yahoo.com/news/ice-fourth-quarter-earnings-beat-133155802.html

http://www.theedgemarkets.com/en/article/open-outcry-trading-stood-no-chance-says-futures-father-melamed

http://www.fastmarkets.com/base-metals-news/exchange-news-cme-to-close-futures-pits-as-outcry-volumes-dwindle-89469

http://www.bloomberg.com/news/articles/2015-02-04/lutnick-s-bgc-pushes-back-deadline-in-bid-to-take-over-gfi-group

http://www.reuters.com/article/2015/02/04/twitter-options-results-idUSL4N0VE6E920150204?type=companyNews