Inventory Control

Inventory control in the context of market making refers to the systematic management of a liquidity provider's net position in a specific asset. When a market maker provides two-sided quotes, they accumulate inventory as they buy from sellers and sell to buyers.

Effective inventory control involves adjusting these quotes to manage the risk associated with holding an unbalanced position. If a market maker holds too much of an asset, they may lower their bid and ask prices to encourage selling and discourage buying.

Conversely, if they are short, they may raise prices to attract buyers and discourage sellers. This process is essential for maintaining neutrality and mitigating exposure to directional price movements.

It directly impacts the spread and depth of the order book. Proper control ensures the market maker remains solvent and profitable by avoiding excessive directional risk.

It balances the trade-off between earning the bid-ask spread and managing market risk.