VIX

http://marketsci.wordpress.com/2008/09/22/test-of-condor%E2%80%99s-vix-based-trading-strategy/

http://trading-stock-market.blogspot.com/2008/03/vix.html

http://www.tradingmarkets.com/.site/stocks/commentary/editorial/-68023.cfm

http://vixandmore.blogspot.com/2007/07/tradingmarkets-5-vix-rule.html

http://seekingalpha.com/article/105643-trading-strategy-vix-spread-and-the-stock-market

*** http://www.smallcapnetwork.com/scb/how-i-use-the-vix-to-trade-stocks/2274/

http://wallstreetblips.dailyradar.com/story/trading_strategy_the_vix_spread_and_the_stock_market/

http://www.ibankcoin.com/woodshedderblog/index.php/2008/09/15/stretched-vix-strategy-signals-buy-the-spy/