no lay perecntage on market

the market for some horse races is not showing a lay percentage (see attached screenshot).  Is there areason for this?

Yes, if at least one selection's lay price is missing, the lay book% will not be displayed, because lay book% is basically the sum of 100/lay_price of each selection, so if lay_price is null, it cannot be in the denominator.

Hi Oxa
This is something I raised several years ago. I understand why the lay % doesn't show, but wouldn't it not be possible for MF Pro (internally within the program code) just to ascribe every null value as a 1000/1 shot in order to calculate a lay book % total for the field? In play for horse racing no hopers have no money against them and the lay book % disappears as the race is hotting up, just when you need to know whether the total lay book % is fair or not for those runners with lay prices.
Ed