> For the complete documentation index, see [llms.txt](https://docs.asterdex.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.asterdex.com/trading/shield-mode/fees-and-specs.md).

# 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>