# Ladder Maintenance Margin Rate **Maintenance margin rate** The margin rate is a measure of the risk of position-guaranteed assets, the maintenance margin is the minimum margin rate of a position, when the position margin rate reaches the maintenance margin rate, your position will be forced to be taken over by the system. We use the marked price to calculate margin rates to avoid forced closing due to non-liquidity or market manipulation. **Ladder maintenance margin rates** In order to prevent large positions from bursting from the impact on market liquidity, resulting in large losses, we use a ladder mechanism to reduce positions. Each ladder corresponds to a different maintenance margin rate, when the system determines that the margin is not enough for the current position of the position of the maintenance margin, it will carry out the operation of reducing the number of positions to the next position in the ladder. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://futuresdoc.gitbook.io/help-center/perpetual/untitled/ladder-maintenance-margin-rate.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.