Bogor, Oct. 10 -- Indonesia's Finance Minister Purbaya Yudhi Sadewa has ordered the Indonesia Stock Exchange (IDX) and the Financial Services Authority (OJK) to take firm action against individuals involved in market manipulation, commonly known as "pump and dump."

Sadewa said he hopes the cleanup to rid the capital market of speculators can be completed within a year.

"If they clean up for a year, I'll know which stocks are being manipulated," he said in Bogor, West Java, on Friday, adding that he actively monitors market movements and recognizes some of the individuals involved.

"I watch the market, too, and I even know some of the players - not the market makers, but those participating," he remarked.

He stressed that cracking down...