# Stock Market

### **Trading Operation Hours**

Shield Mode also supports stock perps, enabling perpetual futures trading for U.S. stocks fully settled in USDT. Trade with up to 50x leverage, long or short, and choose your leverage level when placing an order.

### **Trading Session**

| **Session**              | **Time Period** |
| ------------------------ | --------------- |
| Pre market (off hours)   | 4am–9:30am      |
| Market open              | 9:30am–4pm      |
| Post Market (off hours)  | 4pm–8pm         |
| Market Close (off hours) | 8pm–4am         |

To maintain market stability, the maximum leverage will be temporarily reduced one hour before off hours and will automatically return to normal levels after market opens.

During off-hours, pricing updates will be paused and trading functions will be unavailable. Additionally, the stock perp markets will also be closed during the US public holidays.

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**Regarding trading parameter adjustments:** To mitigate market risks and enhance user experience, Aster may adjust trading parameters such as funding rates, minimum price increments, maximum leverage, risk limits, and maintenance margin requirements in accordance with real-time market conditions.

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