Market maker system is a kind of securities trading system different from bidding, which is generally adopted by OTC market.
Traditional trading is that an expert handles the stock trading of hundreds of listed companies, while the market maker system is a many-to-one relationship, that is, a group of market makers serve a listed company. More importantly, market makers provide funds for transactions. In trading, market makers use their own funds to buy stocks and then sell them. These practices have greatly enhanced the liquidity of the market and increased the depth and breadth of transactions.