Shares of Singapore-listed C&O Pharmaceutical Technology fell as much as 4% to $0.475 today as investors took profit after the Chinese firm announced strong quarterly earnings. Stock now trading –2% at $0.485.

Over 8.3 million shares had changed hands by 9:55 a.m.

C&O’s fiscal fourth quarter net profit rose 62% to HK$60 million ($10.5 million) from HK$37 million a year earlier, helped by higher sales of its products.

“Their shares rose a lot yesterday, so it’s likely to be some profit-taking even though its results seem pretty good,” said a local broker.

C&O shares rose 5.3% on Monday, and have risen 90% so far this year.