Plunge prompts calls for circuit breakers

[SINGAPORE] The Singapore Exchange (SGX), South-east Asia's biggest bourse, faces calls from investors to add circuit breakers after a plunge in shares of three commodity companies erased US$6.9 billion in value over three days.

The bourse operator imposed unprecedented trading restrictions on Blumont Group, Asiasons Capital and LionGold Corp after their stock prices plunged.

Trading caps to prevent sharp gains or losses will give investors time to assess their holdings, according to Liquidnet Holdings Inc and the Securities Investors Association (Singapore), or SIAS.