http://www.futuresmag.com/2015/05/26/what%E2%80%99s-summer-without-little-volatility

http://www.cboeoptionshub.com/2015/05/26/bullish-levels-getting-entrenched-weekly-market-outlook/

http://www.bloomberg.com/news/articles/2015-05-26/u-s-index-futures-fall-indicating-stocks-will-drop-second-day

http://www.cnbc.com/id/102701665

http://www.investing.com/analysis/a-set-up-for-volatility-to-soon-rise-252707

http://www.cabot.net/news/2015/05/options-market-bullish-on-pfizer-acquisition

http://www.reuters.com/article/2015/05/25/us-china-options-idUSKBN0OA03620150525

http://blogs.barrons.com/focusonfunds/2015/05/22/ubs-low-vix-belies-volatility-elsewhere-points-to-stock-tumble-ahead/?mod=google_news_blog

http://www.gulf-times.com/eco.-bus.%20news/256/details/440236/as-lme-looks-east,-cme-throws-down-challenge-in-west

http://finance.yahoo.com/news/traders-keep-bets-first-fed-171034336.html

https://theoptionsinsider.com/2015-oic-state-of-the-u-s-listed-equity-options-industry/

http://www.bloomberg.com/news/articles/2015-05-20/once-unthinkable-criminal-pleas-by-u-s-banks-get-investor-meh-