http://www.hedgeweek.com/2013/12/24/195031/cftc-issues-time-limited-no-action-letter-singapore-exchange-derivatives-clearing

http://www.ft.com/intl/cms/s/0/ad520d6a-6769-11e3-8d3e-00144feabdc0.html?siteedition=intl#axzz2oE6eXGSA

http://www.businessweek.com/news/2013-12-23/crude-options-volatility-lowest-since-at-least-2006-as-wti-falls

http://wallstreetsectorselector.com/2013/12/vix-falls-13-04-monday/

http://www.baltimoresun.com/business/sns-rt-us-nyse-killswitch-20131223,0,5617874.story

http://blogs.wsj.com/moneybeat/2013/12/23/technical-glitch-briefly-prompts-small-cap-surge/

http://www.reuters.com/article/2013/12/23/cme-bonds-idUSL2N0K20HG20131223

http://thetradenews.com/newsarticle.aspx?id=8589936206

http://www.businessweek.com/news/2013-12-20/cme-sues-ex-executive-paulhac-in-contract-breach-case-correct

http://wallstreetsectorselector.com/2013/12/4-1-percent-gdp-vix-mix/

http://www.businessinsider.com/the-last-three-times-this-happened-markets-went-crazy-2013-12

http://www.fool.com/investing/beginning/2013/12/21/what-witching-means-on-wall-street-and-why-you-sho.aspx#.Urg8iLS6mds