Well that must be for the first time in 25 years.

http://uk.reuters.com/article/us-britain-eu-banks-idUKKCN0Z92G8

Sources at banks said memos emailed internally to rattled employees advised them to think about clients first.

"I've convened a big team meeting at 0800 GMT as the juniors are freaking out. I will tell them to focus on their job and wait for the volatility to pass but the reality is much, much starker, we'll have a crash and big layoffs," a senior investment banker at a U.S. bank told Reuters.