Yep, any fund that tracks the respective tech, ASX 300 indexes...

Yep, any fund that tracks the respective tech, ASX 300 indexes etc are legally required to add the newly entered stocks into their portfolio by 4:10pm Friday.

If I had to guess, the funds slowly sold out of stocks that exited these indexes at the beginning of the week and are now slowly buying (so as not to spook the SP) into the newly entered stocks from now till Friday.

Explains the rise in 4DS aswell as the seemingly random rise in Brainchip today (they entered ASX 300) despite the fact their CEO got booted.

This should do well to hold the SP steady tomorrow aswell as funds continue to slowly accumulate, hopefully preventing any sell offs that would normally occur after todays price rise.

An important point to mention though is that these indexes are weighted dependant on the stocks position in the index weighted usually by Market Cap, so they wont be required to accumulate enourmous amounts 4DS sadly, but still enough to send it on a nice run