MT 502 Order to Buy or Sell

MT502 Scope

This message is sent by an instructing party, for example, a client, or its authorised representative, to an executing party, for example, broker-dealer, or where permitted, directly by an executing party to a point of execution such as an exchange. It may be used in broker-to-broker communications.
This message is used to instruct the executing party to buy or sell a given quantity of a specified financial instrument.
It may also be used to:

• request the cancellation of a previously sent order
• replace a previously sent order
• duplicate an order previously sent
• provide a third party with a copy of the message (be it the order or a request for cancellation) being sent.

MT502 Format Specifications

Status	Tag	Qualifier	Generic Field Name	Detailed Field Name	Content/Options	No.
Mandatory Sequence A General Information
M	16R			Start of Block	GENL	1
M	20C	SEME	Reference	Sender's Message Reference	:4!c//16x	2
M	23G			Function of the Message	4!c[/4!c]	3
O	98a	PREP	Date/Time	Preparation Date/Time	A, C, or E	4
----->
M	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	5
-----|
-----> Optional Repetitive Subsequence A1 Linkages
M	16R			Start of Block	LINK	6
O	22F	LINK	Indicator	Linkage Type Indicator	:4!c/[8c]/4!c	7
O	13a	LINK	Number Identification	Linked Message	A or B	8
M	20C	4!c	Reference	(see qualifier description)	:4!c//16x	9
M	16S			End of Block	LINK	10
-----| End of Subsequence A1 Linkages
M	16S			End of Block	GENL	11
End of Sequence A General Information
Mandatory Sequence B Order Details
M	16R			Start of Block	ORDRDET	12
----->
O	94a	4!c	Place	(see qualifier description)	B, C, or F	13
-----|
-----> Optional Repetitive Subsequence B1 Price
M	16R			Start of Block	PRIC	14
M	90a	4!c	Price	(see qualifier description)	A or B	15
----->
O	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	16
-----|
M	16S			End of Block	PRIC	17
-----| End of Subsequence B1 Price
----->
M	22a	4!c	Indicator	(see qualifier description)	F or H	18
-----|
----->
M	98a	4!c	Date/Time	(see qualifier description)	A, B, or C	19
-----|
----->
O	92A	4!c	Rate	(see qualifier description)	:4!c//[N]15d	20
-----|
O	11A	4!c	Currency	(see qualifier description)	:4!c//3!a	21
-----> Mandatory Repetitive Subsequence B2 Trading Parties
M	16R			Start of Block	TRADPRTY	22
----->
M	95a	4!c	Party	(see qualifier description)	P, Q, R, or S	23
-----|
----->
O	97a	4!c	Account	(see qualifier description)	A, B, or E	24
-----|
O	98a	PROC	Date/Time	Processing Date/Time	A or C	25
O	20C	PROC	Reference	Processing Reference	:4!c//16x	26
----->
O	70a	4!c	Narrative	(see qualifier description)	C or E	27
-----|
----->
O	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	28
-----|
M	16S			End of Block	TRADPRTY	29
-----| End of Subsequence B2 Trading Parties
----->
O	36B	4!c	Quantity of Financial Instrument	(see qualifier description)	:4!c//4!c/15d	30
-----|
----->
O	19A	4!c	Amount	(see qualifier description)	:4!c//[N]3!a15d	31
-----|
M	35B			Identification of the Financial Instrument	[ISIN1!e12!c] [4*35x]	32
Optional Subsequence B3 Financial Instrument Attributes
M	16R			Start of Block	FIA	33
O	94B	PLIS	Place	Place of Listing	:4!c/[8c]/4!c[/30x]	34
----->
O	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	35
-----|
----->
O	12a	4!c	Type of Financial Instrument	(see qualifier description)	A, B, or C	36
-----|
O	11A	DENO	Currency	Currency of Denomination	:4!c//3!a	37
----->
O	98A	4!c	Date	(see qualifier description)	:4!c//8!n	38
-----|
----->
O	92A	4!c	Rate	(see qualifier description)	:4!c//[N]15d	39
-----|
----->
O	13a	4!c	Number Identification	(see qualifier description)	A or B	40
-----|
----->
O	17B	4!c	Flag	(see qualifier description)	:4!c//1!a	41
-----|
----->
O	90a	4!c	Price	(see qualifier description)	A or B	42
-----|
----->
O	36B	4!c	Quantity of Financial Instrument	(see qualifier description)	:4!c//4!c/15d	43
-----|
----->
O	35B			Identification of the Financial Instrument	[ISIN1!e12!c] [4*35x]	44
-----|
O	70E	FIAN	Narrative	Financial Instrument Attribute Narrative	:4!c//10*35x	45
M	16S			End of Block	FIA	46
End of Subsequence B3 Financial Instrument Attributes
----->
O	13a	4!c	Number Identification	(see qualifier description)	A or B	47
-----|
O	70E	TPRO	Narrative	Trade Instruction Processing Narrative	:4!c//10*35x	48
M	16S			End of Block	ORDRDET	49
End of Sequence B Order Details
Optional Sequence C Settlement Details
M	16R			Start of Block	SETDET	50
----->
M	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	51
-----|
O	11A	4!c	Currency	(see qualifier description)	:4!c//3!a	52
-----> Optional Repetitive Subsequence C1 Settlement Parties
M	16R			Start of Block	SETPRTY	53
----->
M	95a	4!c	Party	(see qualifier description)	C, P, Q, R, or S	54
-----|
O	97a	SAFE	Account	Safekeeping Account	A or B	55
O	98a	PROC	Date/Time	Processing Date/Time	A or C	56
O	20C	PROC	Reference	Processing Reference	:4!c//16x	57
----->
O	70a	4!c	Narrative	(see qualifier description)	C or D	58
-----|
M	16S			End of Block	SETPRTY	59
-----| End of Subsequence C1 Settlement Parties
-----> Optional Repetitive Subsequence C2 Cash Parties
M	16R			Start of Block	CSHPRTY	60
----->
M	95a	4!c	Party	(see qualifier description)	P, Q, R, or S	61
-----|
----->
O	97a	4!c	Account	(see qualifier description)	A or E	62
-----|
O	98a	PROC	Date/Time	Processing Date/Time	A or C	63
O	20C	PROC	Reference	Processing Reference	:4!c//16x	64
O	70C	PACO	Narrative	Party Narrative	:4!c//4*35x	65
M	16S			End of Block	CSHPRTY	66
-----| End of Subsequence C2 Cash Parties
-----> Optional Repetitive Subsequence C3 Amounts
M	16R			Start of Block	AMT	67
----->
O	17B	4!c	Flag	(see qualifier description)	:4!c//1!a	68
-----|
----->
M	19A	4!c	Amount	(see qualifier description)	:4!c//[N]3!a15d	69
-----|
O	98a	VALU	Date/Time	Value Date/Time	A or C	70
O	92B	EXCH	Rate	Exchange Rate	:4!c//3!a/3!a/15d	71
M	16S			End of Block	AMT	72
-----| End of Subsequence C3 Amounts
M	16S			End of Block	SETDET	73
End of Sequence C Settlement Details
-----> Optional Repetitive Sequence D Other Parties
M	16R			Start of Block	OTHRPRTY	74
----->
M	95a	4!c	Party	(see qualifier description)	P, Q, R, or S	75
-----|
----->
O	97a	4!c	Account	(see qualifier description)	A, B, or E	76
-----|
O	70C	PACO	Narrative	Party Narrative	:4!c//4*35x	77
O	20C	PROC	Reference	Processing Reference	:4!c//16x	78
M	16S			End of Block	OTHRPRTY	79
-----| End of Sequence D Other Parties
Optional Sequence E Two Leg Transaction Details
M	16R			Start of Block	REPO	80
----->
O	98a	4!c	Date/Time	(see qualifier description)	A, B, or C	81
-----|
----->
O	22F	4!c	Indicator	(see qualifier description)	:4!c/[8c]/4!c	82
-----|
----->
O	20C	4!c	Reference	(see qualifier description)	:4!c//16x	83
-----|
----->
O	92a	4!c	Rate	(see qualifier description)	A or C	84
-----|
----->
O	99B	4!c	Number Count	(see qualifier description)	:4!c//3!n	85
-----|
----->
O	19A	4!c	Amount	(see qualifier description)	:4!c//[N]3!a15d	86
-----|
O	70C	SECO	Narrative	Second Leg Narrative	:4!c//4*35x	87
M	16S			End of Block	REPO	88
End of Sequence E Two Leg Transaction Details

MT502 Network Validated Rules

• C1 If an Exchange Rate (field :92B::EXCH) is present, the corresponding Resulting Amount (field :19A::RESU) must be present in the same subsequence. If the Exchange Rate is not present then the Resulting Amount is not allowed.
  

  Subsequence C3 if field :92B::EXCH is ...	Subsequence C3 then field :19A::RESU is ...
  Present	Mandatory
  Not present	Not allowed

• C2 If the Function of the Message (field :23G:) is CANC and the Ordered Quantity (field :36B::ORDR) is present, then the Quantity to Cancel (field :36B::CANC) must be present in the order details sequence.
  If the Function of the Message (field :23G:) is CANC and the Ordered Amount (field :19A::ORDR) is present, then the Amount to Cancel (field :19A::CANC) must be present in the order details sequence.
  If the Function of the Message is not CANC, the Quantity to Cancel and the Amount to Cancel are not allowed.
  

  Sequence A if field :23G is ...	Sequence B and field :36B::ORDR is ...	Sequence B then field :36B::CANC is ...
  NEWM	Present	Not allowed
  REPL	Present	Not allowed
  CANC	Present	Mandatory

  Sequence A if field :23G is ...	Sequence B and field :19A::ORDR is ...	Sequence B then field :19A::CANC is ...
  NEWM	Present	Not allowed
  REPL	Present	Not allowed
  CANC	Present	Mandatory

• C3 The Type of Order Indicator (field :22F::TOOR) and/or the Price Limit (field :90a::LIMI) must be present.
  

  Sequence B if field :22F::TOOR is ...	Then subsequence B1 is ...	Subsequence B1 and field :90a::LIMI is ...
  Present	Optional	Optional
  Not present	Mandatory	Mandatory in at least one of the occurrences of subsequence B1

• C4 If the message is a cancellation or a replacement, that is, Function of the Message (field 23G) is CANC or REPL, then subsequence A1 (Linkages) must be present at least once in the message, and in one and only one occurrence of A1, field :20C::PREV must be present; consequently, in all other occurrences of A1, field :20C::PREV is not allowed.
  

  Sequence A if field :23G: is ...	Then subsequence A1 is ...	And field :20C::PREV is ...
  CANC or REPL	Mandatory (minimum one occurrence of A1 must be present)	Mandatory in one occurrence of subsequence A1, and not allowed in all other occurrences of subsequence A1
  NEWM	Optional	NA

• C5 The following party fields for subsequences C1 and C2 cannot appear more than once in sequence C. The party fields for sequence D cannot appear more than once in a message.
  

  Subsequence C1	Subsequence C2	Sequence D
  :95a::BUYR	:95a::ACCW	:95a::EXCH
  :95a::DEAG	:95a::BENM	:95a::MEOR
  :95a::DECU	:95a::PAYE	:95a::MERE
  :95a::DEI1	:95a::DEBT	:95a::TRRE
  :95a::DEI2		:95a::VEND
  :95a::PSET		:95a::TRAG
  :95a::REAG
  :95a::RECU
  :95a::REI1
  :95a::REI2
  :95a::SELL

• C6 In sequence B, either an ordered quantity (field :36B::ORDR) or an ordered amount (field :19A::ORDR) must be present, but not both.
  

  Sequence B if field :36B::ORDR is ...	Sequence B then field :19A::ORDR is ...
  Present	Not allowed
  Not present	Mandatory

• C7 If a qualifier from the list Deliverers is present in a subsequence C1 in a field :95a::4!c, then all the remaining qualifiers following this qualifier in the list Deliverers (see below) must be present.
  In other words, in sequence C, the following scenarios must be validated:
  
  • If :95a::DEI2 is present in subsequence C1, then :95a::DEI1 must be present in another subsequence C1.
  • If :95a::DEI1 is present in subsequence C1, then :95a::DECU must be present in another subsequence C1.
  • If :95a::DECU is present in subsequence C1, then :95a::SELL must be present in another subsequence C1.
  • If :95a::SELL is present in subsequence C1, then :95a::DEAG must be present in another subsequence C1.
  If a qualifier from the list Receivers is present in a subsequence C1 in a field :95a::4!c, then all the remaining qualifiers following this qualifier in the list Receivers (see below) must be present.
  In other words, in sequence C, the following scenarios must be validated:
  
  • If :95a::REI2 is present in subsequence C1, then :95a::REI1 must be present in another subsequence C1.
  • If :95a::REI1 is present in subsequence C1, then :95a::RECU must be present in another subsequence C1.
  • If :95a::RECU is present in subsequence C1, then :95a::BUYR must be present in another subsequence C1.
  • If :95a::BUYR is present in subsequence C1, then :95a::REAG must be present in another subsequence C1.

  Deliverers		Receivers
  DEI2	Deliverer's Intermediary 2	REI2	Receiver's Intermediary 2
  DEI1	Deliverer's Intermediary 1	REI1	Receiver's Intermediary 1
  DECU	Deliverer's Custodian	RECU	Receiver's Custodian
  SELL	Seller (Deliverer)	BUYR	Buyer (Receiver)
  DEAG	Delivering Agent	REAG	Receiving Agent

• C8 In subsequence C1, if field :95a::PSET is present, then field :97a::SAFE is not allowed in the same sequence.
  

  Subsequence C1 if field :95a::PSET is ...	Subsequence C1 then field :97a::SAFE is ...
  Present	Not allowed within the same occurrence
  Not present	Optional

• C9 In sequence B, if field :22H::BUSE//SWIT is present, then subsequence A1 Linkages is mandatory, and field :20C::PREV must be present in minimum one occurrence of subsequence A1 Linkages.
  

  Sequence B if field :22H::BUSE//SWIT is ...	Then subsequence A1 is ...	And field :20C::PREV is ...
  Present	Mandatory, that is minimum one occurrence of A1	Mandatory, that is must be present in minimum one occurrence of A1
  Not present	Optional	NA

• C10 If field :22F::DBNM//VEND is present in sequence C, then a vendor must be specified; that is one occurrence of sequence D must contain field :95a::VEND.
  

  If sequence C is ...	And in sequence C if field :22F::DBNM//VEND is ... (1)	Then sequence D is ...	And in one occurrence of sequence D field :95a::VEND is ...
  Present	Present	Mandatory, that is sequence D must be present minimum once	Mandatory
  	Not present	Optional	Optional
  Not present	NA	Optional	Optional

  ⁽¹⁾ If the Data Source Scheme is present in field :22F::DBNM//VEND then the conditional rule does not apply.
• C11 In sequence D, if field :95a::EXCH Stock Exchange or :95a::TRRE Trade Regulator is present, then field :97a:: is not allowed in the same sequence.
  

  Sequence D if field :95a::EXCH or TRRE is ...	Sequence D then field :97a:: is ...
  Present	Not allowed within the same occurrence
  Not present	Optional

MT502 Usage Rules

• When an instruction is sent to a party other than the original Receiver, this original Receiver is identified in the other parties sequence as :95a::MERE (Recipient of the Message).
• In cross-border, broker-to-broker trades, the place of settlement (:95a::PSET), must be present.
• When a broker is identified as a confirming party, the party capacity (:22F::TRCA) must be specified.
• When there is a need to pre-allocate, a master reference must be used in the linkage sequence of the MT 502. The MT 514 Trade Allocation Instruction, is used to instruct the pre-allocation. The master reference must be used in the linkage sequence of all the associated MT 514s.
• Field 22F Indicator, with the qualifier PRCO, that is, Pre-Allocation Condition, must be used to indicate how to allocate if the block cannot be fully executed, and to convey rounding instructions in case of fractional shares.
• Optional sequence C Settlement Details may be used to convey early information regarding settlement.
• The Receiver of a request to cancel or replace must advise the requesting party that the request has been accepted or denied in an MT 509 Trade Status Message.