Translation of "Speculators" in Japanese

Some speculators take advantage of the ignorance and helplessness of old people.

相場師の中には老人の無知と寂しさに付け込む奴がいる。

In a fight against speculators who are dumping the U.S. currency, central banks of major countries have carried out massive concerted interventions in the market.

米国通貨を大量に売っている投機筋に対抗して、主要国の中央銀行は市場で大規模な協調介入を行った。