The trading was diversified too, he said. Around 32 per cent turnover of the DSE had been concentrated in five to six companies in the last couple of weeks. They were Beximco Ltd, Beximco Pharmaceuticals, BATBC, LankaBangla Finance, and Robi Axiata, DSE data showed. Investors bought various stocks, indicating their renewed hope in the market, he added. For the last few days, junk stocks have been advancing as many investors think these shares would perform better in the future thanks to regulatory steps, said a stock broker. The Bangladesh Securities and Exchange Commission changed the board of directors of five low-performing companies in a bid to improve their performance. The regulator may take similar steps for some other companies.