http://www.bloomberg.com/news/2015-01-13/signals-cross-in-u-s-stocks-as-volatility-doubles-on-oil.html

http://ir.cboe.com/press-releases/2015/jan-13-2015.aspx

http://www.tradersmagazine.com/news/options/listed-options-volume-up-20-percent-at-355-million-contracts-december-113336-1.html

http://www.reuters.com/article/2015/01/13/sec-exchanges-exams-idUSL1N0US1A420150113

http://www.cboeoptionshub.com/2015/01/12/yields-continue-fall-despite-looming-fed-weekly-market-outlook/

http://www.seeitmarket.com/sp-500-update-whats-vix-telling-investors-now-14014/

http://www.fow.com/3416519/Euronext-launches-options-on-ETFs.html

http://www.investing.com/analysis/one-reason-why-the-new-vix-calculation-is-better-238261

http://www.marketwatch.com/story/transaction-tax-plan-brings-fresh-wall-street-battle-to-capitol-hill-2015-01-12

http://www.bloomberg.com/news/2015-01-13/hindustan-unilever-options-traders-most-bearish-in-two-months.html

http://dealbook.nytimes.com/2015/01/12/bats-to-pay-14-million-penalty-stemming-from-direct-edge-merger/?smid=tw-dealbook&seid=auto&_r=0

http://www.businessweek.com/news/2015-01-12/goldman-sachs-dark-pool-has-trading-outage-amid-euronext-failure