Shares of Singaporean rig-builder Sembcorp Marine closed 12 percent lower on Monday, their biggest daily fall in nine years, prompting a query from the bourse regarding the trading activity.
This is the second time in a month the Singapore stock exchange has issued a trading query to Sembcorp Marine after a sharp rise in the stock on Jan. 23.
Shares of the company closed down 32 Singapore cents at S$2.37 on Monday. They have risen 29 percent so far this year.
The company will report its financial results next week.
(Editing by Vyas Mohan)