Field AvgPx (6) - FIX Protocol FIX.5.0SP2
Calculated average price of all fills on this order. For Fixed Income trades AvgPx is always expressed as percent-of-par, regardless of the PriceType (423) of LastPx (31). I.e., AvgPx will contain an average of percent-of-par values (see LastParPx (669)) for issues traded in Yield, Spread or Discount.
Added in protocol FIX.2.7