I'm trying to determine how the close price for a stock is calculated on the ASX. This is my current understanding.
MarketClose: 16:00:00 so last minute of trading is 15:59:00 - 15:59:59
PreClose: 16:00:00 - 16:09:59
Close: 16:10:00 - 16:11:59
Adjust: 16:12:00 .....
So, is the close price reported for the day the last tick of 15:59:59 or is the close price calculated during the PreClose/Close . (the Close is not actually known until 16:12:00).
The reason for wanting to know this arcane piece of knowledge is that I want to write a routine to calculate the close, without having to look it up.