The rapid developmemt of information technology and its use in all fields has a bositive influence on all fields , and financial markets have a share of this development through the use of an electronic trading system to settle transactions and enhance transparency and disclosure in all activities of these markets and stimulate their performance .

It is worth nothing that these revolutions remove the necessity for nonstop connection with persons through the internet or phone networks , novel knowledge decreases the charges of structure original transaction system and reducing the fences of new participants entry .

The development in transportations expertise allows for quicker ordering then transfer of marketplace information to a bigger collection of participants.

The growing of electronic trading system on an global origin has been phenomenal, and new stock markets have become virtually completely electronic and have emerged as a forerunner in the facilities trade in the stock markets.

Central securities depository system is an integrated work system that of operations aims to control the movement of trading in the stock market and ensure the safety of operations , it is necessary for the work of the stock market in general, and its work is very important to complete all trading operations that take place in the market, therefor legislation worked to organize the work of central securities depository some of them devoted complete laws that explain the features of this organization and everything related to its work.

This study has reached a number of conclusions , perhaps the most important of them are that the use of the electronic trading system as an alternative to the to the manual trading and deposit system gave great flexibility and different information to brokers that made it easier for them to know the executed and unimplemented processes and carrying out an analysis of the conditions of the companies whose shares are traded faster and achieving transparency and safety for dealers and investors in the market has contributed to raising the efficiency and speed of dealing in securities.

The study has come out for a number of recommendations , perhaps the most important of them are that the big and correct procedure of the electronic trading mechanism must be continuous during the future period, it has a clear impact by avoiding human errors, granthing confidence and spreading culture to investors, opening new investment fields , this increased activity results in improvement increased cash and a gradual rise in the efficiency of price information .