AccruedInterestAmt for Convertible bonds

Imported from previous forum

[ original email was from Barry Hunt - barry.hunt@ubsw.com ]
We currently represent the AccuredInterestAmt for CBs as negative for a sell, and positive for a buy. Is this valid for FIX? Can AccuredInterestAmt be -ve, or is this just something to be decided between parties?

Barry Hunt
Analyst Programmer
UBS Warburg