Northern Trust is exploring shutting off external email for thousands of its employees; Inside the h

Howdy, readers! It's BI's hedge-fund reporter Bradley Saacks here, filling in for Olivia this week.  If you're reading this, it means Northern Trust hasn't shut off your email yet! This week saw big news in the cannabis world, promotions at the world's largest bank, and more headlines from Barclays. If you're new to the Wall Street Insider newsletter, you can sign up here. But one of the craziest bits of news in the finance world came from the continued fallout of the...