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Each ach transaction has an event type. An event type specifies the business intent of the transaction. Event types are used in the context of a transaction message type, such as MTOPEN (open transaction), MTCLOSE (close transaction), MTLINK, and MTCASH.

MTOPEN Events

The following are the MTOPEN event types.

OptionDescription
BUY Opens a long position. Can be used to open equities, options, caps, floors, rights, warrants, and all debt.
BUYFUTOpens a long position. A cash record is created at the time of a close or when margin is approved. This event is used to open futures with variation margin.
BUYVARMAROpens a long position. A cash record is created at the time of a close or when margin is approved. This event is used to open options on futures with variation margin.
CALLASNSTCloses a long call option position that is technically short and closes the underlying long. The settlement method must be PHYSICAL, the underlying must be a held security with sufficient quantity.
CDSOPENOpens a long position. It is used to open credit default swap contracts.
CONVERSIONOpens a long or short position. Conversion events are basis specific and do not replicate to all accounting bases. The event excludes options on futures, currency, futures, forwards, repos, reverse repos, and index securities.
CPBLots with unknown cost basis are opened with the MTOPEN REC event. The CPB event closes the unknown lot either fully or partially and opens a lot with the cost basis provided on the event. Normally used for brokerage.
DEPOSITOpens a long position. Generally used for short term interest at maturity securities. A bank certificate of deposit is a time deposit product.
LPOPENOpens a long limited partnership position.
OPENFUTUREOpens a long or short position and creates a cash record only if there are fees and the fees are expensed. This event is used to book futures without variation margin.
OPENSWAPOpens interest rate, total rate or return, currency, and inflation linked swap contracts. Also opens lock securities. The contract is always opened long, the legs are opened long and short.
PUTASNSTCloses a long put option position that is technically short and opens the underlying long. The settlement method must be PHYSICAL.
RECOpens a long or short position. REC events can be opened with an unknown cost basis that can be adjusted later with the CPB event. This event is very similar to the CONVERSION event.
SELLFUTOpens a short position. A cash record is created at the time of a close or when margin is approved. This event is used to open futures with variation margin.
SELLVARMAROpens a short position. A cash record is created at the time of a close or when margin is approved. This event is used to open options on futures with variation margin.
SHORTSELLOpens a short position. Can be used to open equities, rights, warrants, and all debt.
TBAOPENOpens a long or short to be announced (TBA) position. A cash record is created if the entity election, Create TBA Cashflow flag, is Y. If it is N, a cash record is created for the net cash movement at the time of the close.
WRITEOpens a short position. Can be used to open options, caps, and floors.



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MTCLOSE Events

The following are the MTCLOSE event types.

OptionDescription
ASSIGNCloses written call and put options and assigns them for cash.
BUYCVRCloses a short position. Can be used to close equities, options, caps, floors, rights, warrants, and all debt.
BUYFUTCloses a short position. This event is used to close futures with variation margin.
CALLASNSTCloses a short call option position at cost and closes the underlying long if the settlement method is PHYSICAL or opens the underlying short if the settlement method is PHYSHORT.
CALLEXRST Closes a long call option position at cost and opens the underlying long if the settlement method is PHYSICAL or closes the underlying short if the settlement method is PHYSHORT.
CLOSEFUTURECloses a long or short position and creates a cash record only if there are fees and the fees are expensed. This event is used to close futures without variation margin.
CLOSESWAPCloses interest rate, total rate or return, currency, and inflation linked swap contracts. Also closes lock securities. The contract is always closed long, the legs are closed long and short.
CURRENCY_EXER_ASNUsed to physically exercise or assign a currency option only. It closes a long currency option and opens a spot contract for the currencies involved by creating a cash disbursement for the currency sold and a cash receipt for the currency purchased.
DEL Used to close lots/positions down at cost.
EXERCISECloses long call and put options and exercises them for cash.
FUNDSPLTMRGTransfers either a full position, partial position, or lot from one entity to another.
LPCLOSECloses a long limited partnership position.
PUTASNSTCloses a short put option position at cost and opens the underlying long if the settlement method is PHYSICAL or closes the underlying short if the settlement method is PHYSHORT.
PUTEXRSTCloses a long put option position at cost and closes the underlying long if the settlement method is PHYSICAL or opens the underlying short if the settlement method is PHYSHORT.
ROLLOVERRolls over lots created with a DEPOSIT event into a new security with new terms.
SELLCloses a long position. Can be used to close equities, options, caps, floors, rights, warrants, and all debt.
SELLFUTCloses a long position. This event is used to close futures with variation margin.
SELLVARMARCloses a long position. This event is used to close options on futures with variation margin.
TBACLOSEUsed to close TBA lots/positions as a result of an allocation, pair-off, turn-around, and so on. A cash record is created if the entity election, Create TBA Cashflow flag, is Y. If it is N, a cash record is created for the net cash movement at the time of the close.

MTLINK Events

The following are the MTLLINK event types.

OptionDescription
JNLCVR Nets a long and short position to one net long or short position. The MTLINK event creates an MTCLOSE JNLCVR LONG loopback which then spawns an MTCLOSE JNLCVR SHORT event.
SPOTUsed to create a currency contract which usually settles in just a few days from trade date. No cost is recorded. The MTLINK event generates two MTCASH SPOT events, one being a disbursement for the currency sold and the other a receipt for the currency purchased.
TRADEFWDUsed to create a currency contract which usually settles on some future date. No cash record is created at the time of the trade but rather when either the contract is closed or when it matures. The MTLINK event generates either an MTCLOSE TRADEFWD LONG or MTOPEN TRADEFWD SHORT event for the non-settle leg first depending on the close eligible flag (tag 3924) and whether or not the currency being sold is the non-settle leg. If tag 3924 is N and the currency being sold is the non-settle leg, an MTOPEN TRADEFWD SHORT event is created. The non-settle event then generates the settle leg loopback event.