Market maker
From ACT Wiki
Market makers in an asset quote simultaneous bid prices and offer prices to the market, at which they are willing to deal with the market to buy the asset (at the bid price) or sell the asset (at the offer price).
Market makers in an asset quote simultaneous bid prices and offer prices to the market, at which they are willing to deal with the market to buy the asset (at the bid price) or sell the asset (at the offer price).