To CBOT,CDE,CFE,CME,DTB,ECBOT,EUREXUS,FTA,GLOBEX,HKFE,IPE,KSE,MATIF,MEFFRV,MEXDER,NYBOT,NYMEX,OSE.JPN,SNFE,SGX,TSE.JPN,USFE traders: Sun Sep 14 22:02:21 2008 EST IMPORTANT NOTICE regarding Intraday Margin In light of the market volatility and the continuing turmoil in financial services stocks, IB will eliminate intraday margin reductions. Commencing at 10:30 P.M. EST today, contracts which utilize value-at-risk margin models such as SPAN, Eurex, or TIMS in the commodity sub-account. Traders may consult the account window in the Trader Work Station to see what the overnight margin will be. We expect that intraday margin reductions will remain suspended for subsequent trading sessions and we will make further announcements as market conditions develop. Regardless of the likelihood of large, rapid changes in market conditions, we recommend that traders examine their portfolios to consider their exposure under extreme-move scenarios. Interactive Brokers Risk Management