Full extended hours trading allows market participants to buy and sell securities outside of regular core session hours, enabling traders to react quickly to news and events that occur during non-trading hours. This feature gives users flexibility to trade on their schedule and provides commission-free trading for US exchange-listed securities from 4 am to 8 pm ET Monday to Friday. The extended session is available before the market opens and after the market closes, allowing traders to make trades outside of the normal market hours, which can be particularly beneficial for international end-users who have different local time zones. By enabling full extended hours trading, users can test and embed this feature into their fintech apps, providing additional flexibility to buy and sell whole shares in the US market during extended hours convenient to their local time zones.