RE: Just a reminder for those that20 Nov 2018 08:31
In really basic terms think of the SETS trading platform as two order books, one automatic A trades and one ‘off book’ O trades facilitated by market makers
Only A trades move the price, market makers can only deal within the spread set by SETS
SETS is an electronic trading platform
An automatic trade for a single share can move the price significantly and give the appearance of radical price movements