http://www.minyanville.com/business-news/markets/articles/What-the-VIX-Is-Telling-Us/1/29/2013/id/47725

https://theoptionsinsider.com/industry/?p=100007981&qcABC=1

http://www.reuters.com/article/2013/01/28/us-nyse-euronext-sprecher-idUSBRE90R0ZI20130128

http://www.zerohedge.com/news/2013-01-29/hedging-great-unwind-second-highest-treasury-put-volume-record-hits-tape

http://blogs.wsj.com/marketbeat/2013/01/29/facebook-options-tilt-bullish-as-investors-price-in-big-moves/?mod=WSJBlog

http://www.marketwatch.com/story/sec-charges-trader-with-high-speed-trading-scheme-2013-01-29?siteid=yhoof2

http://online.barrons.com/article/SB50001424052748703892404578269744128338904.html?mod=BOL_columnist_latest_col_art

http://www.bloomberg.com/news/2013-01-29/u-s-stock-options-with-biggest-changes-in-implied-volatility.html?cmpid=yhoo

http://marketplayground.com/2013/01/28/proof-that-the-markets-can-still-move-higher/

http://finance.yahoo.com/news/media-firms-probed-data-release-035000359.html

http://www.forbes.com/sites/deanpopplewell/2013/01/29/eur-strangled-by-vanilla-options-and-shallow-pullbacks/

http://www.tradersmagazine.com/news/equity-commissions-volumes-up-2013-110789-1.html