What are the common red flags to watch out for in order to detect and prevent ETF fraud?

Common red flags to watch out for in order to detect and prevent ETF fraud include unusually high returns, lack of transparency in the fund's holdings, frequent trading within the fund, and unregistered or unlicensed sellers offering the ETF. It is important to conduct thorough research and due diligence before investing in an ETF to avoid falling victim to fraud.