Tariffs latest: ‘I know what the hell I’m doing’: Trump defiant as worldwide trade tariffs come into effect

News Snapshot:

Traders braced for 'down days' The floor of the New York Stock Exchange isn't the bear pit it used to be. Trading has evolved from a contact sport to a more sedate process - think computer screens and cathedral calm. They don't shout like they used to but, right now, I swear you can hear them scream. It's been a tough few days. In a city that hasn't slept since markets started tumbling, Wall Street traders wear the burden of the horror they have seen and still see ahead. The NYSE is the business end of political change and the...