A financial centre (BE), financial center (AE), or financial hub, is a location with a concentration of participants in banking, asset management, insurance or financial markets with venues and supporting services for these activities to take place. Participants can include financial intermediaries (such as banks and brokers), institutional investors (such as investment managers, pension funds, insurers, and hedge funds), and issuers (such as companies and governments). Trading activity can take place on venues such as exchanges and involve clearing houses, although many transactions take place over-the-counter (OTC), that is directly between participants. Financial centres usually host companies that offer a wide range of financial services, for example relating to mergers and acquisition