http://tickertape.tdameritrade.com/options/2016/04/volatility-update-small-caps-23397

http://www.insidefutures.com/article/1697745/Options%20Traders%20Uncover%20the%20Mysteries%20of%20Implied%20Volatility:%20E-minis%20and%20SPY%20Provide%20an%20Example.html

http://www.ftseglobalmarkets.com/news/cboe-to-start-overnight-dissemination-of-cboe-volatility-index-vix-from-april-15th.html

http://www.cnbc.com/2016/04/13/cme-group-to-close-new-york-trading-floor-at-end-of-year-.html

http://www.reuters.com/article/us-usa-congress-regulators-idUSKCN0X92HV

http://www.bloomberg.com/news/articles/2016-04-13/inside-equinix-s-ny4-data-center-where-wall-street-trades

http://www.hedgeweek.com/2016/04/13/238395/hedge-funds-post-best-monthly-returns-january-2012

http://www.clintongazette.com/what-next-for-charles-schwab-corp-stock-after-todays-bullish-options-activity/

http://www.reuters.com/article/us-derivatives-markets-regulations-idUSKCN0X92VP

http://www.cnbc.com/2016/04/12/wall-street-and-options-traders-at-odds-over-apple.html

http://www.smallcapwired.com/merck-co-inc-stock-was-sold-by-options-traders/148540/

http://www.forbes.com/sites/fredoltarsh/2016/04/13/is-it-worthwhile-to-sell-covered-calls-in-stocks-like-apple-and-etfs-such-as-xle-and-spy/#4b0b425c59da