Does anyone know exactly when the IB 50% margin cut-off time begins? I found some links, but it's still not clear to me if it is the same as for the YM (future on the Dow Jones), whose margin cut-off time begins at 9.30 AM (EST). http://www.interactivebrokers.ca/en/trading/marginRequirements/futuresMargin.php?ib_entity=ca http://www.cme.com/trading/prd/fx/euro_FCS.html http://www.cme.com/trading/prd/fx/euro_FTH.html "Open outcry hours" begin and end when exactly (for the EURO FX of course)? IB says: "All Futures products will be margined at 50% of the normal margin requirements during normal liquid trading hours for each product type. Each day at 15 minutes before the close of the normal trading session for a product, margin requirements will revert back to the 100% requirement until the opening of normal trading hours the next day. Margin requirements will always be applied at 100% for all spread transactions." ...and also... Normal Trading Margin Commences ECBOT & Globex: The earlier of 15 minutes before open outcry hours for a product ends or 15:45 pm EST But it doesn't say when they begin.