http://www.bloomberg.com/news/2013-02-26/cme-17-billion-lost-market-value-no-barrier-to-deutsche-boerse.html

http://dealbreaker.com/2013/02/cme-deutsche-borse-start-end-fling/

http://www.suntimes.com/business/18464135-420/deutsche-boerse-cme-deny-any-attempt-to-join-forces.html

http://finance.yahoo.com/news/volatility-etf-trading-surges-market-194151126.html

http://www.fointelligence.com/Article/3160286/CME-locks-horns-with-CFTC-in-legal-battle.html

http://slant.investorplace.com/2013/02/vix-spikes-fear-index/

http://investorplace.com/247trader/4-call-option-contenders/

http://www.fow.com/Article/3158480/Is-the-CME-Group-skirting-the-CFTCs-new-requirements-for-swaps.html

http://blogs.wsj.com/deals/2013/02/25/deutsche-boerse-and-cme-would-make-strategic-sense-face-political-hurdles/

http://www.tradersmagazine.com/news/sec-examining-how-exchanges-develop-order-types-110931-1.html

http://online.barrons.com/article/SB50001424052748704103204578316373482105966.html?mod=BOL_columnist_latest_col_art

http://www.reuters.com/article/2013/02/25/deutscheboerse-cme-reaction-idUSWEA00ASI20130225