Risk

1. The risk of going short, that is, the market continues to rise after you sell, and you will not be able to enjoy this part of the income.

2. The risk of being trapped, because it is very likely that the market will fall when you buy again.

Because no one can accurately find the timing of the market's rise and fall, the risk of short-term operations like yours is still relatively high, and the cost is also relatively high.

Costs

1. Subscription fee, redemption fee, management fee, custody fee

2. Opportunity cost, such as interest rate loss