Dhaka, Oct. 6 -- Share market analysts have raised a red flag over potential manipulation, with four listed companies with halted or suspended production continuing to trade on the market.

Halted or suspended production implies a status in which firms are not generating any revenue. Investing in such firms should not be recommended, said the share market analysts, warning particularly small investors to remain cautious about such companies.

"Many traders could knowingly invest in these risky companies for quick profits," said Tariqul Islam, a long-time investor in the Dhaka share market.

Some of these traders could have insider information, enabling timely buying and selling, he said.

"But small investors, driven by the greed to make ...