AllocCommissionRate <2660> field
FIX 5.0 SP2 EP264
The commission rate when AllocCommissionAmount <2654> is based on a percentage of quantity, amount per unit or a factor of "unit of measure". If the rate is a percentage or expressed in basis points, use the decimalized form, e.g. "0.05" for a 5% commission or "0.005" for 50 basis points.