noun
A person who engages in speculative financial trading, buying and selling assets to profit from price changes. Used in economic and investment contexts.
彼は通貨市場で有名なスペキュレーターだ。
He is a well-known speculator in the currency market.
投資家 is a general term for an investor who allocates capital for long-term returns, while スペキュレーター specifically refers to a speculator focused on short-term price fluctuations and higher risk.
Borrowed from English 'speculator'.