When he's talking to clients — one has phoned already today, and he's sent out several emails — he points out that nothing has actually changed. The U.K. is still part of the European Union, and it could take two years for an exit to actually happen.
He also thinks that once the initial shock of the vote subsides, people will realize that Britain isn't going anywhere.
"The country's relationship with the European Union will look similar to what it is now," he said. "They'll engage in pretty much the same treaties, with a few changes to maybe immigration and payments to the EU, but it'll look the same. Britain will just have more control over the process."
Bob Sewell, president and CEO of Bellwether Investment Management in Oakville, Ontario, Canada, agrees that this will be a long process and that investors shouldn't do anything drastic. He also points out most of the investment risk right now is in Europe and with companies that have significant exposure to the EU and the U.K.
Corporate earnings on European banks could also be impacted, especially if an exit causes even slower growth than what the world is already experiencing, but he said that "the broader global impact on growth will take time to assess."