When the cash gets too low for the manager's comfort level (depends on the typical pattern of net inflows and outflows, as well as anticipated flows based on recent performance), the manager will sell some of his least favorite holdings, and when the cash gets too high he will buy some new holdings or add to
his favorite existing holdings.
Ideally in addition to your
existing bookmaker, you should be looking to
hold accounts at one or two reduced juice bookmakers such as Pinnacle Sports together with a couple of recreational books, where you'll find inflated
favorite prices and most likely attractive odds on the underdog.