http://blog.markettaker.com/2016/04/19/long-calls-and-bull-call-spreads-4/

http://www.foxbusiness.com/markets/2016/04/19/nyse-byrds-take-flight-on-april-21.html

http://www.nasdaq.com/article/as-silver-etfs-soar-options-activity-turns-brisk-cm608651

http://www.financemagnates.com/binary-options/products-2/breaking-ice-launches-binary-options-nyse-amex-platform/

http://www.bloomberg.com/news/articles/2016-04-20/euro-dollar-volatility-tumbles-ahead-of-brexit-vote-analysis

http://www.forbes.com/sites/fredoltarsh/2016/04/19/stock-market-rallies-to-close-at-year-high-but-options-prices-in-the-sp-indicate-investors-are-wary/#446e270f78c0

http://www.bloomberg.com/news/articles/2016-04-19/u-s-index-futures-rise-as-investors-look-to-earnings-oil-gains

http://tradinggods.net/trading-gods-blog/vix-daily-update-volatility-muted-sp500-hits-new-high/

http://www.cityam.com/239207/vix-volatility-index-hits-2016-low-as-markets-find-their-feet

http://www.forbes.com/sites/petertchir/2016/04/19/more-concerns-with-vix-related-equity-hedges/#5586ee8e76a2

http://finance.yahoo.com/news/wall-street-says-clients-continue-123251569.html

http://www.bloomberg.com/news/articles/2016-04-19/death-of-controversial-nyse-rule-improved-trading-broker-says