http://www.bloomberg.com/view/articles/2017-05-17/worries-volatility-and-activism

http://www.marketwatch.com/story/wall-streets-fear-gauge-on-track-for-biggest-jump-in-more-than-3-months-2017-05-17

http://seekingalpha.com/article/4073965-happens-volatility-rises

http://www.investing.com/analysis/opening-bell:-risk-on-returns-to-markets,-safe-havens-rise-200189641

http://seekingalpha.com/article/4073935-still-makes-sense-optimistic

http://tradinggods.net/trading-gods-blog/us-stocks-struggle-gains-amid-political-uncertainty/#

http://www.bloomberg.com/gadfly/articles/2017-05-16/is-twitter-killing-volatility

http://www.bloomberg.com/news/articles/2017-05-17/there-s-a-big-technical-reason-for-the-low-volatility-in-stocks

http://financialregnews.com/futures-industry-association-outlines-plan-enhance-stability-derivatives-market/

http://finance.yahoo.com/news/derail-markets-probably-nothing-expert-says-134628547.html

http://www.bloomberg.com/news/articles/2017-05-12/former-orioles-decinces-found-guilty-in-insider-trading-case

http://etfdailynews.com/2017/05/16/are-investors-becoming-numb-to-risk/