This may be true, but the chance is very small, and it can only happen if two conditions are met.

A certain index rises by 10% within ten days. The probability of this happening is very high. The market is driven by sector rotation. Some industries will rise sharply for a period of time, such as the recent TMT and real estate finance in December last year. It is completely impossible to rise so much.

Possibly, even up to 15%.

If there happens to be a graded leverage fund that tracks this index, and the leverage is relatively high, which can reach 3 times, then buying the highly leveraged Category B fund can triple the income to 30%.

But I want to say that this possibility is really small, and the risk is also very high, because you can make 30% or lose 30%, as long as the decline is the same.

This kind of operation is generally something only extremely experienced retail investors and institutions dare to do, and ordinary people cannot do it.

I have never dared to do it. It is really a game for the brave and cannot be played by the timid.