It also asked CFM Holdings to confirm whether it was in compliance with the listing rules.
CFM Holdings' boost in share price came on the back of high trading volume. The counter saw 70.3 million shares traded, making it the second-highest traded stock on the SGX.
Shares in CFM Holdings closed 7.5 cents or 31.9% higher at 31 cents on June 10.
Cover photo: CFM Holdings