Method of matching orders by posting orders of buying and selling is classified as

electronic communication network
electronic dealer network
electronic stock network
electronic order network

The correct answer is: A. electronic communication network (ECN).

An electronic communication network (ECN) is a computerized system that allows buyers and sellers to trade securities directly with each other, without the need for a broker. ECNs are regulated by the Securities and Exchange Commission (SEC) and are subject to the same rules and regulations as traditional stock exchanges.

ECNs offer a number of advantages over traditional stock exchanges, including lower trading costs, faster execution times, and greater liquidity. ECNs have become increasingly popular in recent years, and now account for a significant portion of all stock trading in the United States.

Here is a brief explanation of each option:

  • B. electronic dealer network is a network of dealers who trade securities with each other. Dealers are market makers, meaning they are always willing to buy or sell a security at a given price. Electronic dealer networks are typically used for trading less liquid securities, such as small-cap stocks.
  • C. electronic stock network is a network of stock exchanges that allows traders to buy and sell stocks from multiple exchanges. Electronic stock networks are typically used by institutional investors, such as hedge funds and pension funds.
  • D. electronic order network is a network of order books that allows traders to place orders for stocks. Order books are used to match buyers and sellers of stocks.