London Metal Exchange Enumerations

The London Metal Exchange (LME) is the world’s largest market for trading base metals futures and options.

The following fields have Enumerations:

• MMT_MKT_MECH - Market mechanism through which a trade was executed.

• MMT_MOD_IND - Identifies trade cancellations, or amendments of a previous trade.

• MMT_PRICE_FORMING_IND - Identifies whether a trade is price-forming, or contributes to the price discovery process.

• MMT_TRD_MODE - Trading period during which an on-book trade was executed, or origin of an off-book trade report (on-exchange / off-exchange / SI).

• TRADE_TYPE - Type of trade

MMT_MKT_MECH - Enumeration

Enumeration ID	Enumeration Description
1	Central Limit Order Book
4	Off Book

MMT_MOD_IND - Enumeration

Enumeration ID	Enumeration Description
-	New trade
C	Trade cancellation

MMT_PRICE_FORMING_IND - Enumeration

Enumeration ID	Enumeration Description
P	Plain vanilla (price-forming) trade

MMT_TRD_MODE - Enumeration

Enumeration ID	Enumeration Description
2	Continuous trading
5	Trade reporting (on-exchange)

TRADE_TYPE - Enumeration

Enumeration ID	Enumeration Description
11	Current market price trade (Exchange, non-Select) [until 20250321]
12	Current market price trade (Client, non-Select) [until 20250321]
13	Average or Amalgamated trade (Exchange, non-Select) [until 20250321]
14	Average or Amalgamated trade (Client, non-Select) [until 20250321]
15	Client cross vs cleared Give-up [until 20250321]
16	Client cross vs late cleared Give-up [until 20250321]
2	Electronic trade
21	Electronic trade (Exchange) [until 20250321]
22	Electronic trade (Client) [until 20250321]
31	Inter-office trade
41	1st Ring matched trade
42	2nd Ring matched trade
43	3rd Ring matched trade
44	4th Ring matched trade
45	Basis 1st Morning Ring
46	Basis 2nd Morning Ring
47	Basis 1st Afternoon Ring
48	Basis 2nd Afternoon Ring
51	1st Kerb matched trade
52	2nd Kerb matched trade
53	Basis Morning Kerb
54	Basis Afternoon Kerb
6	Implied trade
61	Exceptional Use trade (Exchange) [until 20250321]
62	Exceptional Use trade (Client) [until 20250321]
TC	Trade at Close