Vahid Mazloumin, known as Sultan of Coins, was executed in Tehran early on Wednesday.
In early July, Mazloumin, 58-year-old gold coin dealer, was arrested.
He and his accomplice Mohammad-Esmaeil Qassemi, who had formed a smuggling gang were convicted of being involved in economic corruption, manipulating the domestic currency market and making illegal deals, and they were sentenced to death.
Based on a report released by Central Bank of Iran (CBI) about nine months ago, and after investigation carried out by Iran's Ministry of Intelligence and the Police, a number of key individuals involved in embarrassing the Forex and currency markets were arrested.
In recent months, economic situation and the instability in the Forex market have caused popular discontent.