# Fees & Specs

### **Trading Fee**

To celebrate the launch of Perp Shield Mode, we're conducting a limited-time zero-fee event. Both opening and closing positions will incur no fees.

### **Profit Share**

Aster has implemented a profit-sharing model to reduce the impact of fees on users. When the position is profitable, a fee range from 15% to 20% will be charged on the profits. When the position incurs a loss, no fees will be incurred.

### **Flat Fee**

A fixed fee rate applies to opening and closing positions. The current fee rate is 0.03%.

### **Dynamic Slippage**

The platform determines the slippage based on the liquidity of the pair's underlying assets and open interest, as observed from market performance.

<br>

\ <br>


---

# 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://docs.asterdex.com/trading/shield-mode/fees-and-specs.md?ask=<question>
```

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.