RE: Idiots guide to market process3 Feb 2019 09:05
bassguy - it is very interesting - just bringing it up to date - SETSmm has been replaced by SETSsq - the SETS bit happens only during the regular daily auctions at 8,9,11,14 and 16.30 hours - yielding the UT trades we seen some of the time.
The authors point is that if you do accurate Buy/Sell monitoring, as I do on the trade analysis, you should formally ignore the UT trades as they are between participants with direct market access. Thus the simple conclusion is that I should ignore all UT trades for the purposes of establishing the nett MM trade position.
This would be correct if Market Makers were expressly forbidden from participating in the daily auctions - however I have no reason to believe that this is necessarily the case, and some reason to believe that MMs can participate in the daily auctions - always happy to be corrected, especially as it might get our dear MM friends off the hook for the 21st Dec 2018 end day auction manipulation charge.