These companies can be broken down into large, medium and small-sized firms. There were 336 large firms, 358 medium-sized firms, and 19 small-sized firms at the end of 2020.

The Jakarta Stock Exchange (IDX) handles the securities transaction in Indonesia. It is a primary goal of the IDX to provide the framework in order to facilitate orderly, fair and efficient trading of securities.

In 2021, Jakarta Stock Exchange experienced a massive boost in the number of investors. The daily trading value and frequency set a new record for the exchange.

At the end of 2020, there are 713 listed companies in Jakarta Stock Exchange. These companies are divided into three categories which are large, medium and small-sized firms. There are 336 large firms, 358 medium-sized firms and 19 small-sized firms in the Jakarta Stock Exchange.

For those seeking to invest or trade in the Jakarta Stock Exchange will require clearing and settlement services from IDX's clearing houses i.e. the Indonesia Clearing House Limited. Security deposits are held by members of the exchange to ensure collateral for transaction obligation. The Clearing House is additionally subject to Mandatory Clearing and Proficiency Requirements (MCPs) set by the Financial Services Authority (FSA) in Indonesia.

In 2021, Jakarta Stock Exchange installed Trading Surveillance System, a mechanism to detect and detect market misconduct. This system involves automating processes for monitoring and screening orders prior to their approval. In addition, it will help to monitor and detect any market manipulation.

Furthermore, IDX launched real-time order routing system in 2021, with the aim of easing trade execution workflows and viewable order books. The system allows investors to immediately know the availability of orders and to receive real-time order responses to drive efficiencies in trading activity.

In conclusion, the Jakarta Stock Exchange is a great stock exchange with lots of potential to provide investors opportunity on trading and investment. The exchange provides numerous benefits such as automatic trading surveillance system, real-time order routing system, mandatory clearing and proficiency requirements and security deposits to ensure safety and liquidity.