Also known as the active stop mechanism, it refers to the stop business pace that the business business accepts in order to manipulate risks when the volatility of the stock index reaches the designated fuse point. In detail, it is a mechanism to set a fuse price for a contract before it reaches the price limit, so that the contract transaction quotation can only be within this price range for a period of time.

There are two views on fuse mechanism: broad and narrow. In a broad sense, it refers to setting an interval limit for the fluctuation range of one-day cost in order to manipulate the business risks of stocks, futures or other financial derivatives. Once the transaction price touches the upper and lower limits of the interval, the business will stop for a period of time ("melting and breaking"), or "lying flat" without exceeding the upper or lower limits ("melting without stopping").

in a narrow sense, it refers to the "fuse" of index futures. It is called "fuse" because the principle of this mechanism is similar to that of circuit insurance booth. Once the voltage is very high, the fuse will actively fuse to avoid electrical damage. The "fuse mechanism" in the financial business has the same effect of avoiding the excessive cost of financial business products, giving the market a certain period of silence, warning investors of risks, and winning time and opportunity for relevant parties to accept relevant risk manipulation skills and steps. The embodiment of the fuse mechanism

: provident fund inquiry method:

1. Go to the counter of the service hall of the local housing provident fund management center or the touch screen inquiry machine for inquiry;

2. hold the provident fund joint card to inquire at the handling branch of the bank where the account is opened;

3. inquire through the voice telephone provided by the provident fund management center;

4. Make an inquiry on the inquiry website.

the closure of housing provident fund accounts refers to the termination of the wage relationship between the unit and the employees (but the labor relationship is retained), which leads to the interruption of housing provident fund deposit. If the housing provident fund account cannot be transferred and does not meet the conditions for cancellation and withdrawal of housing provident fund, the interrupted housing provident fund account shall be sealed up. When you enter a new company and another company is not sealed, and move to a second company, after the labor relationship between employees who are not employed in a new company is terminated, the original unit shall bring the housing provident fund account into the central custody account management for 3 days from the date of termination.