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5 (Entity_ID)
10 (Sec_Alias)
21 (Accounting_Basis)
37 (Settlement_Date)
68 (Issue_Date)
473 (First_Coupon_Date)
474 (Last_Coupon_Date)
38 (Maturity_Date)
42 (Maturity_Price)
40 (Units): set to par value
45 (Unit_Price): set to current market price
By default, the event uses original price
49 (Traded_Interest): can be 0 because it is calculated on-the-fly.
50 (Net_Amount): set to current market value
By default, the event cost
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