http://www.reuters.com/article/2012/10/16/us-exchanges-cme-margins-idUSBRE89F1C620121016

http://online.barrons.com/article/SB50001424053111904034104578060514048485022.html?mod=BOL_columnist_latest_col_art

http://www.tradersmagazine.com/news/exchanges-defend-liability-limits-when-systems-malfunction-110430-1.html

http://seekingalpha.com/article/926401-writing-put-options-on-microsoft

http://www.reuters.com/article/2012/10/15/us-blackrock-etffees-idUSBRE89E1LM20121015

http://investorplace.com/2012/10/avoid-pharma-options-except-for-this-one/

http://www.tradersmagazine.com/news/lch-clearing-swapsclear-consultancy-110425-1.html

http://www.reuters.com/article/2012/10/15/us-hedgefunds-emergingmarkets-performanc-idUSBRE89E1AD20121015

http://www.futuresmag.com/2012/10/15/electronic-trend-continues-for-equity-derivatives

http://www.businessinsider.com/options-strategies-for-earnings-season-2012-10

http://www.livetradingnews.com/options-trading-alert-ford-motor-nysef-89952.htm#.UH1nYYbUmHg

http://seekingalpha.com/article/925311-brazil-etf-options-beyond-ewz