Stock is a game mechanic utilized by certain champion abilities, items and summoner spells.

Champion Abilities

Champion abilities that utilize a stock system have a short cooldown that is unchanged by cooldown reduction (most of the time), but they can only be cast when you have a charge of that ability. The recharge timer on these charges is affected by cooldown reduction, and the maximum amount of charges varies with every ability.

Updated up to V8.8.

Items

Summoner Spells