The ApplicationSequenceControl is used for application sequencing and recovery. Consisting of ApplSeqNum (1181), ApplID (1180), ApplLastSeqNum (1350), and ApplResendFlag (1352), FIX application messages that carries this component block will be able to use application level sequencing. ApplID, ApplSeqNum and ApplLastSeqNum fields identify the application id, application sequence number and the previous application sequence number (in case of intentional gaps) on each application message that carries this block.

The CommissionDate component block is used to carry commission information such as the type of commission and the rate.

The ComplexEventTime component is nested within the ComplexEventDate in order to further qualify any dates placed on the event and is used to specify time ranges for which a complex event is effective. It is always provided within the context of start and end dates. The time range is assumed to be in effect for the entirety of the date or date range specified.

The presence of DiscretionInstructions component block on an order indicates that the trader wishes to display one price but will accept trades at another price.

The Instrument component block contains all the fields commonly used to describe a security or instrument. Typically the data elements in this component block are considered the static data of a security, data that may be commonly found in a security master database. The Instrument component block can be used to describe any asset type supported by FIX.

The InstrumentLeg component block, like the Instrument component block, contains all the fields commonly used to describe a security or instrument. In the case of the InstrumentLeg component block it describes a security used in multileg-oriented messages.

The LegStipulations component block has the same usage as the Stipulations component block, but for a leg instrument in a multi-legged security.

The NestedParties component block is identical to the Parties Block. It is used in other component blocks and repeating groups when nesting will take place resulting in multiple occurrences of the Parties block within a single FIX message.. Use of NestedParties under these conditions avoids multiple references to the Parties block within the same message which is not allowed in FIX tag/value syntax.

The NestedParties3 component block is identical to the Parties Block. It is used in other component blocks and repeating groups when nesting will take place resulting in multiple occurrences of the Parties block within a single FIX message.. Use of NestedParties3 under these conditions avoids multiple references to the Parties block within the same message which is not allowed in FIX tag/value syntax.

The OrderQtyData component block contains the fields commonly used for indicating the amount or quantity of an order. Note that when this component block is marked as "required" in a message either one of these three fields must be used to identify the amount: OrderQty, CashOrderQty or OrderPercent (in the case of CIV).

The Peg Instructions component block is used to tie the price of a security to a market event such as opening price, mid-price, best price. The Peg Instructions block may also be used to tie the price to the behavior of a related security.

The PositionQty component block specifies the various types of position quantity in the position life-cycle including start-of-day, intraday, trade, adjustments, and end-of-day position quantities. Quantities are expressed in terms of long and short quantities.

Ths SecurityTradingRules component block is used as part of security definition to specify the specific security's standard trading parameters such as trading session eligibility and other attributes of the security.

The SettlParties component block is used in a similar manner as Parties Block within the context of settlement instruction messages to distinguish between parties involved in the settlement and parties who are expected to execute the settlement process.

The SpreadOrBenchmarkCurveData component block is primarily used for Fixed Income to convey spread to a benchmark security or curve.

The TriggeringInstruction component block specifies the conditions under which an order will be triggered by related market events as well as the behavior of the order in the market once it is triggered.

The UnderlyingStipulations component block has the same usage as the Stipulations component block, but for an underlying security.

The ExpirationQty component block identified the expiration quantities and type of expiration.

The UnderlyingAmount component block is used to supply the underlying amounts, dates, settlement status and method for derivative positions.

The standard FIX message trailer

The SideTrdRegTS component block is used to convey regulatory timestamps associated with one side of a multi-sided trade event.