How to calculate close price on ASX?

[mrelectron]

Hi:

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.

Cheers
Mark

 

[mrelectron]

Re: how to calculate close price on asx

found this at premiumdata it appears that sp uses the Close 2 methodology below, so if sp uses this methodology well thats good enuf' for me.

Close Price
Close 1: The last traded price at or before the day's regular trading session has been completed (16:00:00).
Close 2: The last traded price inclusive of any trades that occur as a result of the closing price auction between 16:00:01 and 16:10:00.

Currently Standard and Poors/ASX use the Close 2 methodology.

found at:
http://www.premiumdata.net/support/asx-index-prices.php