# US

### External Coverage

The Relayer derives external prices for stocks 24/5, from Sunday 8:00 PM ET to Friday 8:00 PM ET. 

This is achieved by aggregating across the following sessions:

* Pre-Market: 4:00 AM - 9:30 AM ET
* Market: 9:30 AM - 4:00 PM ET
* Post-Market: 4:00 PM - 8:00 PM ET
* Overnight: 8:00 PM - 4:00 AM ET

The overnight trading session is provided by Blue Ocean ATS (BOATS).

### **Data Source**

See the [Specification Index](https://docs.trade.xyz/consolidated-resources/specification-index) page for pricing referencing sources.