And do not judge that it must be ponzi scam please, because if something is a ponzi scam, then it would never set a limit of selling the fund.
BTW, nothing is impossible. For example, you can check the quarterly contract of Bitcoin futures in OKEx and Huobi Global, comparing with the real-time bitcoin price index, its price index has a price spread. That is a thing if you have a good quantitative trading strategy, then you would be able to arbitrage from the market.
That is how the quantitative fund works.
What are you even saying? Quantitative funds just means that a certain trading/investment strategy is based on algorithms and programs and such. Also, you don't see Binance, OKEx, Huobi, and other exchanges advertising "guaranteed returns", right? Exactly.