SecurityID (Tag = 48, Type: String)

CUSIP or other alternate security identifier

Used in:

• Indication of Interest (6)
• Advertisement (7)
• Execution Report (8)
• News (B)
• Email (C)
• New Order - Single (D)
• New Order - List (E)
• Order Cancel Request (F)
• Order Cancel/Replace Request (G)
• Order Status Request (H)
• Allocation (J)
• Don't Know Trade (Q)
• Quote Request (R)
• Quote (S)
• Market Data Request (V)
• Market Data - Snapshot/Full Refresh (W)
• Market Data - Incremental Refresh (X)
• Quote Cancel (Z)
• Quote Status Request (a)
• Quote Acknowledgement (b)
• Security Definition Request (c)
• Security Definition (d)
• Security Status Request (e)
• Security Status (f)
• Mass Quote (i)
• List Strike Price (m)

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