CommType (Tag = 13, Type: char)

Commission type

Valid values:
'1' per unit (implying shares, par, currency, etc)
'2' percentage
'3' absolute
'4' (for CIV buy orders) percentage waived - cash discount
'5' (for CIV buy orders) percentage waived - enhanced units
'6' points per bond or ontract [Supply ContractMultiplier (231) in the Instrument component block if the object security is denominated in a size other than the industry default - 1000 par for bonds.]

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