That S3XT code interested me. Here's some info:...

That S3XT code interested me. Here's some info:

https://www.asxonline.com/intradoc-cgi/groups/participant_services/documents/manuals/asx_016426.pdf

page 33

"Facilitated Specified Size Block Special Crossings are Block Special
Crossings in Cash Market Products that involve a Principal position and a
Client position and meet the minimum size requirements (Specified Size).
The reporting of Special Crossings which meet the FSSBSC criteria are
allowed to be delayed.
Order and
Trade History
Initial Trade Notifications are displayed to ASX and all users of your
Trading Participant only. They are displayed in the Trade History window
with a condition code of S1XT, S2XT or S3XT and with a in the column
titled ITN. New and Fill order records are displayed in the Order History
window with a condition code of S1, S2 or S3 and may be viewed by all
users of your Trading Participant.
Once the FSSBSC has been reported to the market , the ITN trade will be
cancelled and appear as a reversed trade in the Trade History window.
The FSSBSC trade report will be displayed in the Trade History window
with a condition code of S1XT, S2XT or S3XT, however, a will not appear
in the column titled ITN. These trades are displayed for all users.
New and Fill order records are displayed in the Order History window with
a condition code of S1, S2 or S3 and may be viewed by all users of your
Trading Participant.
Impact on
Market
Statistics
Initial Trade Notifications do not update official prices or daily trade
statistics, that is, they do not update open, high, low, last or closing prices,
number of trades, volume or value traded
However, once the FSSBSC has been reported to the market it is treated
like any other Special Crossing where it will not update official prices such
as open, high, low, last or closing prices, however will update the daily
trade statistics including the number of trades, volume and value traded."

So, it looks like someone taking a position. Whoever write this stuff must be a lawyer ...