Is it the fact that 'AIM Rebal' is rebalancing on the update date, while 'AIM on each stock seperately' is below the Buy/Sell threshold and has no activity?
Partly true, but even when AIM is giving orders to B/S Rebalancing has it's influnce. I think rebalancing is kinda' like snapping your wrist when throwing a ball. It adds to the momentum.