http://www.barrons.com/articles/a-smart-way-to-play-travel-stock-ctrip-1461632469

http://www.bloomberg.com/news/articles/2016-04-26/fed-to-keep-options-open-for-june-rate-hike-decision-day-guide

http://www.bloomberg.com/news/articles/2016-04-26/earnings-blowups-send-tech-traders-to-options-market-for-hedges?cmpid=google

http://tradinggods.net/trading-gods-blog/vix-daily-update-volatility-returns-investors-enter-risk-off-mode/

http://www.afr.com/markets/equity-markets/us-stocks-slip-ahead-of-earnings-fed-meeting-20160425-goesqm

http://www.tradersmagazine.com/news/options/cboe-futures-exchange-adds-connectivity-with-stellar-trading-systems-115242-1.html

http://leaprate.com/2016/04/moscow-exchange-experiences-derivatives-trading-interruption-2/

http://www.cabot.net/editors/jacob-mintz/analysts-center/options-market-update-4-25-16