South Korea is reportedly preparing new rules that would force social-media personalities promoting cryptocurrencies and stocks to reveal what they own and whether they are being paid.

Democratic Party lawmaker Kim Seung-won, a member of the National Assembly’s Political Affairs Committee, is drafting amendments to the Capital Market and Financial Investment Business Act and the Act on the Protection of Virtual Asset Users, according to a report from Korean-language business news website Herald Business.

Under the proposal, individuals who repeatedly offer advice or receive compensation to encourage the public to buy or sell financial products or virtual assets must disclose the compensation received and the type and quantity of assets…