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	Field or Component	Field Name	Req'd	Comments	Depr.

8

BeginString

FIX.4.2 (Always unencrypted, must be first field in message)

9

BodyLength

(Always unencrypted, must be second field in message)

35

MsgType

(Always unencrypted, must be third field in message)

(Always unencrypted)

(Always unencrypted)

Trading partner company ID used when sending messages via a third party (Can be embedded within encrypted data section.)

128

DeliverToCompID

Trading partner company ID used when sending messages via a third party (Can be embedded within encrypted data section.)

90

SecureDataLen

Required to identify length of encrypted section of message. (Always unencrypted)

91

SecureData

Required when message body is encrypted. Always immediately follows SecureDataLen field.

34

MsgSeqNum

(Can be embedded within encrypted data section.)

50

SenderSubID

(Can be embedded within encrypted data section.)

142

SenderLocationID

Sender's LocationID (i.e. geographic location and/or desk) (Can be embedded within encrypted data section.)

57

TargetSubID

"ADMIN" reserved for administrative messages not intended for a specific user. (Can be embedded within encrypted data section.)

143

TargetLocationID

Trading partner LocationID (i.e. geographic location and/or desk) (Can be embedded within encrypted data section.)

116

OnBehalfOfSubID

Trading partner SubID used when delivering messages via a third party. (Can be embedded within encrypted data section.)

144

OnBehalfOfLocationID

Trading partner LocationID (i.e. geographic location and/or desk) used when delivering messages via a third party. (Can be embedded within encrypted data section.)

129

DeliverToSubID

Trading partner SubID used when delivering messages via a third party. (Can be embedded within encrypted data section.)

145

DeliverToLocationID

Trading partner LocationID (i.e. geographic location and/or desk) used when delivering messages via a third party. (Can be embedded within encrypted data section.)

43

PossDupFlag

Always required for retransmitted messages, whether prompted by the sending system or as the result of a resend request. (Can be embedded within encrypted data section.)

97

PossResend

Required when message may be duplicate of another message sent under a different sequence number. (Can be embedded within encrypted data section.)

52

SendingTime

(Can be embedded within encrypted data section.)

122

OrigSendingTime

Required for message resent as a result of a ResendRequest. If data is not available set to same value as SendingTime (Can be embedded within encrypted data section.)

212

XmlDataLen

Required when specifying XmlData to identify the length of a XmlData message block. (Can be embedded within encrypted data section.)

213

XmlData

Can contain a XML formatted message block (e.g. FIXML). Always immediately follows XmlDataLen field. (Can be embedded within encrypted data section.)

See Appendix M – FIXML Support

347

MessageEncoding

Type of message encoding (non-ASCII characters) used in a message’s "Encoded" fields. Required if any "Encoding" fields are used.

369

LastMsgSeqNumProcessed

The last MsgSeqNum value received and processed. Can be specified on every message sent. Useful for detecting a backlog with a counterparty.

370

OnBehalfOfSendingTime

Used when a message is sent via a "hub" or "service bureau". If A sends to Q (the hub) who then sends to B via a separate FIX session, then when Q sends to B the value of this field should represent the SendingTime on the message A sent to Q. (always expressed in UTC (Universal Time Coordinated, also known as "GMT")

2	AdvId
5	AdvTransType
3	AdvRefID	Required for Cancel and Replace AdvTransType messages
55	Symbol
65	SymbolSfx
48	SecurityID
22	IDSource
167	SecurityType	Must be specified if a Future or Option. If a Future: Symbol, SecurityType, and MaturityMonthYear are required. If an Option: Symbol, SecurityType, MaturityMonthYear, PutOrCall, and StrikePrice are required.
200	MaturityMonthYear	Specifiesthe month and year of maturity. Required if MaturityDay is specified.
205	MaturityDay	Can be used in conjunction with MaturityMonthYear to specify a particular maturity date.
201	PutOrCall	For Options.
202	StrikePrice	For Options.
206	OptAttribute	For Options.
231	ContractMultiplier	For Fixed Income, Convertible Bonds, Derivatives, etc. Note: If used, quantities should be expressed in the "nominal" (e.g. contracts vs. shares) amount.
223	CouponRate	For Fixed Income.
207	SecurityExchange	Can be used to identify the security.
106	Issuer
348	EncodedIssuerLen	Must be set if EncodedIssuer field is specified and must immediately precede it.
349	EncodedIssuer	Encoded (non-ASCII characters) representation of the Issuer field in the encoded format specified via the MessageEncoding field.
107	SecurityDesc
350	EncodedSecurityDescLen	Must be set if EncodedSecurityDesc field is specified and must immediately precede it.
351	EncodedSecurityDesc	Encoded (non-ASCII characters) representation of the SecurityDesc field in the encoded format specified via the MessageEncoding field.
4	AdvSide
53	Shares
44	Price
15	Currency
75	TradeDate
60	TransactTime
58	Text
354	EncodedTextLen	Must be set if EncodedText field is specified and must immediately precede it.
355	EncodedText	Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field.
149	URLLink	A URL (Uniform Resource Locator) link to additional information (i.e. http://www.XYZ.com/research.html)
30	LastMkt
336	TradingSessionID

93	SignatureLength	Required when trailer contains signature. Note: Not to be included within SecureData field
89	Signature	Note: Not to be included within SecureData field
10	CheckSum	(Always unencrypted, always last field in message)

FIX.4.2 Message

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