ISO 15022 Data Field Dictionary

MT508 Scope

This message is sent by an account servicer (account servicing institution) to an account owner or its designated agent. The account servicer may be a local agent (sub-custodian) acting on behalf of their global custodian customer, or a custodian acting on behalf of an investment management institution or a broker/dealer.

This message is used to confirm the increase or decrease in securities with a given status within a holding, that is, intra-position transfer.

MT508 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

4!c

Reference

(see qualifier description)

: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

-----> Optional Repetitive Subsequence A1 Linkages

M

16R

 

 

Start of Block

LINK

5

O

13a

LINK

Number Identification

Linked Message

A or B

6

M

20C

4!c

Reference

(see qualifier description)

:4!c//16x

7

M

16S

 

 

End of Block

LINK

8

-----| End of Subsequence A1 Linkages

M

16S

 

 

End of Block

GENL

9

End of Sequence A General Information

Mandatory Sequence B Intra-Position Details

M

16R

 

 

Start of Block

INPOSDET

10

O

95a

ACOW

Party

Account Owner

P or R

11

M

97a

SAFE

Account

Safekeeping Account

A or B

12

O

94a

SAFE

Place

Place of Safekeeping

B, C, or F

13

----->

M

36B

4!c

Quantity of Financial Instrument

(see qualifier description)

:4!c//4!c/15d

14

-----|

O

13B

SSBI

Number Identification

Securities Sub-balance Identification

:4!c/[8c]/30x

15

O

19A

COMT

Amount

Collateral Monitor Amount

:4!c//[N]3!a15d

16

M

35B

 

 

Identification of the Financial Instrument

[ISIN1!e12!c]
[4*35x]

17

Optional Subsequence B1 Financial Instrument Attributes

M

16R

 

 

Start of Block

FIA

18

O

94B

PLIS

Place

Place of Listing

:4!c/[8c]/4!c[/30x]

19

----->

O

22F

4!c

Indicator

(see qualifier description)

:4!c/[8c]/4!c

20

-----|

----->

O

12a

4!c

Type of Financial Instrument

(see qualifier description)

A, B, or C

21

-----|

O

11A

DENO

Currency

Currency of Denomination

:4!c//3!a

22

----->

O

98A

4!c

Date/Time

(see qualifier description)

:4!c//8!n

23

-----|

----->

O

92A

4!c

Rate

(see qualifier description)

:4!c//[N]15d

24

-----|

----->

O

13a

4!c

Number Identification

(see qualifier description)

A, B, or K

25

-----|

----->

O

17B

4!c

Flag

(see qualifier description)

:4!c//1!a

26

-----|

----->

O

90a

4!c

Price

(see qualifier description)

A or B

27

-----|

----->

O

36B

4!c

Quantity of Financial Instrument

(see qualifier description)

:4!c//4!c/15d

28

-----|

----->

O

35B

 

 

Identification of the Financial Instrument

[ISIN1!e12!c]
[4*35x]

29

-----|

O

70E

FIAN

Narrative

Financial Instrument Attribute Narrative

:4!c//10*35x

30

M

16S

 

 

End of Block

FIA

31

End of Subsequence B1 Financial Instrument Attributes

----->

M

98a

4!c

Date/Time

(see qualifier description)

A or C

32

-----|

----->

O

22F

4!c

Indicator

(see qualifier description)

:4!c/[8c]/4!c

33

-----|

O

70E

SPRO

Narrative

Settlement Instruction Processing Narrative

:4!c//10*35x

34

----->

M

93A

4!c

Balance

(see qualifier description)

:4!c/[8c]/4!c

35

-----|

M

16S

 

 

End of Block

INPOSDET

36

End of Sequence B Intra-Position Details

Optional Sequence C Additional Information

M

16R

 

 

Start of Block

ADDINFO

37

----->

O

95a

4!c

Party

(see qualifier description)

P, Q, or R

38

-----|

M

16S

 

 

End of Block

ADDINFO

39

End of Sequence C Additional Information

MT508 Network Validated Rules

  • C1 The 'Balance From' must be different from the 'Balance To'. The Sub-balance Type of field :93A::FROM must be different from the Sub-balance Type of field :93A::TOBA. This check applies to sequence B.

  • C2 If the message is a cancellation, that is, Function of the Message (field 23G) is CANC, then subsequence A1 (Linkages) must be present at least once in the message, and field :20C::PREV must be present in one and only one occurrence of A1; 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

    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

    Not applicable

MT508 Usage Rules

  • This message must not be used to report the movement of securities out of or into a safekeeping account. It reports only on movements that affect the status/availability of the security, that is, movements from one sub-balance to another or intra-position transfers, within that safekeeping account.

  • This message should also be used when the account servicer confirms an intra-position instruction, that is, following an MT 524.

  • In case of blocking of shares, depending on your internal processing method, you can use either an MT 566 Corporate Action Confirmation or an MT 508 Intra-Position Advice. The MT 566 is to be used when the securities safekeeping account is debited and another securities safekeeping account is credited. The MT 508 is to be used when the securities remain in the same securities safekeeping account but are given a blocked status.

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