http://www.hedgeweek.com/2015/04/07/220989/cme-group-volume-averaged-15m-contracts-day-q1-2015

http://www.mideasttime.com/cboe-holdings-target-of-unusually-high-options-trading-cboe/395557/

http://www.wsj.com/articles/lightly-leveraged-etfs-still-cause-concerns-1428375813?tesla=y

http://www.wsj.com/articles/what-is-a-bear-market-1428375817

http://www.businessinsider.com/warren-buffett-on-risk-and-volatility-2015-4

http://blogs.wsj.com/moneybeat/2015/04/06/on-monday-bad-news-is-good-news-again/

http://www.chicagomag.com/Chicago-Magazine/April-2015/Traded-Away/

http://www.marketwatch.com/story/weak-jobs-report-is-good-news-if-it-delays-the-fed-2015-04-06?siteid=yhoof2

http://www.bloomberg.com/news/articles/2015-04-06/boring-no-more-poloz-sends-canadian-volatility-to-2-decade-high

http://www.investopedia.com/articles/active-trading/040515/how-profit-volatility.asp

http://www.usatoday.com/story/money/2015/04/03/preet-bharara-insider-trading-denied/25240365/

http://www.ft.com/intl/fastft/303103/virtu-financial-seeks-361m-haul-ipo