Stock exchanges are the official places where investors buy and sell securities. A stock exchange provides facilities an

[answerhappygod]

Stock exchanges are the official places where investors buy andsell securities. A stock exchange provides facilities andinfrastructure such as trading and clearing systems, so thatinvestors may trade securities easily, hence reducing the risk ofinvesting. On the other hand, over the counter (OTC) is consideredan unofficial market. This is because the securities are not tradedon a formal market.