At this point i am only refering to the curriculum ! For any other CFA exam that i will study for, I think i will not use any third-party material again. 3rd party often skip or summarize concepts so much !
Its constant dividend pay out ratio when you take dividend/Net income when it gives you a constant figure across all years then its a constant divident pay out ration and not stable because the fomula ration you have used is for constant dividend payout ratio