9.2 Cross Requests and Pre-Arranged Trades:
A market member is required to enter a cross request to inform the market about his intention to execute a cross or pre-arranged trade. A cross trade is a trade where a member trades against an own order in the order book. As for pre-arranged trades, orders from at least two members are executed against each other as previously negotiated. The exchange may stipulate at any time a maximum size for a cross trade.
Market members are required to inform the market about their intention to execute a cross trade above a certain quantity. Accordingly, as soon as a cross request is entered into the system, all market participants have the opportunity to enter corresponding orders (or quotes, depending on the product and the status of the market member). After entering a cross request, the initiating market member may only enter the matching orders (or quotes, depending on the product and the status of the market member) within a certain time frame: there is a minimum amount of time the market member has to wait before entering matching orders/quotes, and there is also a maximum amount of time the market member can wait before the cross request expires. Both of these time periods are specified by the exchange. For options and futures, the time window is 5 to 65 seconds after the cross request entry.
Cross requests are possible for both options and futures contracts; combination cross requests can only be entered for futures contracts. For option combinations cross requests must be entered in the respective legs.