http://www.chicagotribune.com/business/breaking/chi-us-futures-regulator-urges-conflictofinterest-rules-20120921,0,5749130.story?track=rss

http://www.marketwatch.com/story/us-derivatives-trading-drops-occ-report-2012-09-21?siteid=yhoof2

http://www.minyanville.com/mvpremium/2012/09/20/getting-long-vega-in-spy/

http://www.tradersmagazine.com/news/exchanges-meet-with-brokers-over-failsafe-mechanisms-110326-1.html

http://seekingalpha.com/article/879571-using-weekly-options-in-a-calendar-or-diagonal-spread

http://www.reuters.com/article/2012/09/20/us-globeop-data-idUSBRE88J18S20120920

http://investorplace.com/2012/09/wade-into-a-choppier-china-with-options-cat-fcx-fxi/

http://www.cnbc.com/id/49105154

http://www.businessweek.com/articles/2012-09-20/a-shortage-of-bonds-to-back-derivatives-bets

http://uk.finance.yahoo.com/news/stocks-news-europe-call-holders-082353085.html

http://community.nasdaq.com/News/2012-09/option-premiums-are-made-of-only-these-two-things-know-your-options.aspx?storyid=175274

http://community.nasdaq.com/News/2012-09/the-vix-signals-another-trading-opportunity.aspx?storyid=175248