The Allocation message provides the ability to specify how an order or set of orders should be subdivided amongst one or…

The allocation ACK message is used to acknowledge the receipt and status of an allocation message received from the inst…

The Business Message Reject message can reject an application-level message which fulfills session-level rules and canno…

The email message is similar to the format and purpose of to the News message, however, it is intended for private use b…

The news message is a general free format message between the broker and institution.

Advertisement messages are used to announce completed transactions.

Indication of interest messages market merchandise which the broker is buying or selling in either a proprietary or agen…

The second Market Data message format is used for incremental updates.

Some systems allow the transmission of real-time quote, order, trade and/or other price information on a subscription ba…

The Market Data Request Reject is used when the broker cannot honor the Market Data Request, due to business or technica…

The Market Data messages are used as the response to a Market Data Request message.

The BidRequest Message can be used in one of two ways depending on which market conventions are being followed.

The Bid Response message can be used in one of two ways depending on which market conventions are being followed. …

The list cancel request message type is used by institutions wishing to cancel previously submitted lists either before …

The list execute message type is used by institutions to instruct the broker to begin execution of a previously submitte…

The list status message is issued as the response to a List Status Request message sent in an unsolicited fashion by the…

The list status request message type is used by institutions to instruct the broker to generate status messages for a li…

The strike price message is used to exchange strike price information for principal trades. It can also be used to excha…

The NewOrderList Message can be used in one of two ways depending on which market conventions are being followed.

The Mass Quote message can contain quotes for multiple securities to support applications that allow for the mass quotin…

The quote message is used as the response to a Quote Request message and can be used to publish unsolicited quotes.

An optional response to Quote, Mass Quote, Quote Cancel, and Quote Request message is the Quote Acknowledgement message.

The Quote Cancel message is used by an originator of quotes to cancel quotes.

In some markets it is the practice to request quotes from brokers prior to placement of an order. The quote request mess…

The quote status request message is used by the institution to generate an execution report that contains the quote stat…

The Security Definition message is used for the following: 1. Accept the security defined in a Security Definition messa…

The Security Definition Request message is used for the following: 1. Request a specific Security to be traded with the …

The Security Status Request message provides for the ability to request the status of a security.

The Trading Session Status provides information on the status of a market.

The Trading Session Status Request is used to request information on the status of a market.

The Heartbeat monitors the status of the communication link and identifies when the last of a string of messages was not…

The logon message authenticates a user establishing a connection to a remote system.

The logout message initiates or confirms the termination of a FIX session.

The reject message should be issued when a message is received but cannot be properly processed due to a session-level r…

The resend request is sent by the receiving application to initiate the retransmission of messages. This function is uti…

The sequence reset message is used by the sending application to reset the incoming sequence number on the opposing side…

The test request message forces a heartbeat from the opposing application.

The Settlement Instructions message provides either the broker’s or the institution’s instructions for trade settlement.

The Don’t Know Trade (DK) message notifies a trading partner that an electronically received execution has been rejected…

The execution report message is used to: 1. Confirm the receipt of an order 2. Confirm changes to an existing order (i.e…

The order cancel reject message is issued by the broker upon receipt of a cancel request or cancel/replace request messa…

The order cancel/replace request is used to change the parameters of an existing order.

The order cancel request message requests the cancellation of all of the remaining quantity of an existing order.

The new order message type is used by institutions wishing to electronically submit securities and forex orders to a bro…

The order status request message is used by the institution to generate an order status message back from the broker.