Mainland China’s securities regulator will fine-tune policies related to back-door listing attempts by US-listed Chinese companies, industry insiders say, but it is unlikely to ban them or impose other rigid restrictions.

“It is clear that the regulator does not like the recent speculation on the A-share markets triggered by the relisting trend and will do something to curb such conduct, but it seems impossible they would shut good-quality companies out of the domestic market,” Wang Yansong, a senior investment banker based in Shenzhen, said.

The China Securities Regulatory Commission (CSRC) was considering capping valuation multiples for companies seeking relisting on the A-share market after delisting from the US market, Bloomberg reported on Tuesday. Another option being discussed was introducing a quota to limit the number of reverse mergers each year from companies formerly listed on a foreign bourse.

To curb speculation, it is most important to show the authorities have clear and strict standards for approving these deals

Wang Yansong.

However, Wang said the CSRC was more likely to strengthen verification of back-door listing deals on a case-by-case basis.

“To curb speculation, it is most important to show the authorities have clear and strict standards for approving these deals, and won’t allow poor-quality companies to seek premiums through this process,” she said.

US-listed mainland companies have been flocking to relist on the A-share market since early last year, when the domestic market started a bull run, in order to shed depressed valuations in American markets.

The valuations of relisted companies have boomed, and that has triggered a surge in speculation on possible shell companies – poorly performing firms listed on the Shanghai or Shenzhen bourses. In a process called a reverse takeover or back-door listing, a shell can buy a bigger, privately held company through a share exchange that gives the private company’s shareholders control of the merged entity.