US President Donald Trump threatened Iran with further attacks after the Islamic Republics new leader signaled defiance and suggested there would be no easing of a war thats upending energy flows and global markets.Europes Stoxx 600 index slumped putting the benchmark on course for a second week of losses. US futures retreated after the S&P 500 Index slid to its lowest since November. Brent crude edged higher after rallying over 9% on Thursday.The Opening Trade has everything you need to know as markets open across Europe. With analysis you won't find anywhere else, we break down the biggest stories of the day and speak to top guests who have skin in the game. Hosted by Lizzy Burden and Tom Mackenzie. (Source: Bloomberg)