Sorry V could not resist.
A market maker is a company, that quotes both a buy and a sell price in a financial instrument or commodity held in inventory, hoping to make a profit on the bid-offer spread, or turn.
Market makers play a big role in over the counter markets like the OTC-BB and Pinksheets. Often times, there is not a lot of liquidity and trading volume in these markets, which creates a need for market makers to step in and create a trading environment.
Market makers regulate risk by increasing the spread between the bid and ask prices. When a security exhibits extreme volatility, market makers will increase the spread to give themselves a wider margin for error. Conversely, the spread is narrowed as demand increases and competition between market makers heats up for business.
Market Data 
Markets 
AI
