Tag 651
UnderlyingLastPx
Abbreviation:
UndLastPxDescription
The calculated or traded price for the underlying instrument that corresponds to a derivative. Used for transactions that include the cash instrument and the derivative.
Wire Format & Usage Example
Single field (key=value)
651=150.25
In a FIX message (ExecutionReport)
8=FIX.4.4 | 9=... | 35=8 | 49=SENDER | 56=TARGET | 34=1 | 52=20240101-09:30:00.000 | … | 651=150.25 | … | 10=...
Fields are delimited by SOH (ASCII 0x01), shown here as " | ". The highlighted field 651=150.25 is this field's position in the message.