BEIJING -- The China Securities Regulatory Commission (CSRC) said on Friday that punishment on insider trading will become more harsh in order to "purify" the capital market environment.

The CSRC said in a statement that it will make more efforts to clamp down on the leaking and prying of non-public information involved in securities trading.

The commission has busted 20 cases of insider trading this year and penalized one institution and 31 individuals.