http://www.suntimes.com/business/18033917-420/cme-earnings-drop-hit-by-slower-trading.html

http://wallstreetsectorselector.com/2013/02/thevix-index-and-vix-etns-soar/

http://online.barrons.com/article/SB50001424052748704372504578285772805982966.html?ru=yahoo&mod=yahoobarrons

http://www.tradersmagazine.com/news/effective-date-circuit-breakers-postponed-110845-1.html

https://theoptionsinsider.com/tradingtechnology/?p=100008428&qcABC=1

http://www.bloomberg.com/news/2013-02-05/u-s-stock-options-with-biggest-changes-in-implied-volatility.html?cmpid=yhoo

http://www.efinancialnews.com/story/2013-02-04/ice-sculpts-nyse-clearing-challenge

http://finance.yahoo.com/news/sec-expands-probe-executive-trades-034400456.html;_ylt=AqClL0JHRYlG7uHLtsXNur7puYdG;_ylu=X3oDMTN0ODZjM2tzBG1pdANOZXdzIFRvcCBTdG9yeSBMaXN0BHBrZwNjYzk5MWU4ZC1mMGZlLTMyMDAtYTk2Zi03YTQyODdkMWM4ODQEcG9zAzYEc2VjA3RvcF9zdG9yeQR2ZXIDMzFiYWI4ZTMtNmY5Zi0xMWUyLWFmZGItYWQ1MWQwYzdiNTE4;_ylg=X3oDMTFpcW84dHVuBGludGwDdXMEbGFuZwNlbi11cwRwc3RhaWQDBHBzdGNhdANuZXdzBHB0A3NlY3Rpb25z;_ylv=3

http://www.ifre.com/eu-lawmaker-panel-rejects-key-derivatives-rules/21066878.article

http://www.nasdaq.com/article/cmes-daily-trading-volume-for-treasury-options-hit-record-friday-20130204-00996#.UREihWfUSds

http://www.bloomberg.com/news/2013-02-05/nyse-fourth-quarter-profit-tops-estimates-on-cost-cutting.html

http://www.bloomberg.com/news/2013-02-04/cme-to-shut-k-c-board-of-trade-boost-chicago-wheat.html