CATALIST-LISTED water-treatment company Memiontec Holdings said it is unaware of any reasons for the unusual price movements in its shares in response to a query issued by bourse regulator Singapore Exchange Regulation (SGX RegCo) earlier on Tuesday.

The stock had closed at 49.5 Singapore cents on Monday, and opened at 50 cents on Tuesday morning. The counter rose steadily over the first hour of trading, to hit as high as 56.5 cents at 10.14am, up 7 cents or 14.1 per cent.

At 10.18am, SGX RegCo issued a query to Memiontec on the unusual price movements in the company's shares. In its query, the bourse regulator asked if the company was aware of any possible explanation for the trading, including any information not previously announced, or the public circulation of information by rumours or reports.

SGX RegCo also asked the company to confirm its compliance with listing rules.

Memiontec's shares ended the first half of the trading day at 55 cents, after briefly touching an intraday high of 57 cents at 10.30am.

Over the course of the second half of the trading day, the counter experienced some swings in share price, going from as high as 56.7 cents at 1.26pm to as low as 53.5 cents at 3pm, before recovering to 56 cents at 3.28pm.

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The stock pared some gains thereafter to end Tuesday at 53.5 cents, up 8.1 per cent or S$0.04.

In its response at 5.56pm, the company said it was unaware of any information not previously announced, including those that may be material and price-sensitive, that would explain the trading. The company also confirmed its compliance with the listing rules.