Stock markets around the world took a nosedive Friday after Britain voted to leave the European Union.

The Dow lost 610 points as of the closing bell Friday. Those numbers suggest investors are jittery following the UK's vote.

Cheers rang out after the Brexit announcement, but soon after stocks tumbled across the globe.

"If you look at the S&P as well as the Dow 30, we've basically lost everything that we have gained from the last almost six months of 2016. So as a result, again, it's kind of a start over," said Gregory Anderson, CEO of GRAnderson Wealth Management Group in Denver.

He said the loss might sound scary to some, but suggests Americans look at it as an opportunity.

"Don't think people should panic at this point," Anderson said.

He said if someone is worried about their 401k but still have one or two decades until retirement, the investor might benefit from the lower stock prices.

"As a result, you're buying more shares in your 401k and those shares will be worth a lot more down the road," Anderson said.

If someone is planning to retire sooner, he said invest conservatively by putting money into stocks with prices that don't take big swings one way or the other.

Anderson suggests to think long-term and don't sell stocks now as it could create a loss in a portfolio.

"What we're advising our investors, our clients is to stay the course at this point. We see this as really an opportunity to buy into a lower market," he said.

How Monday's market plays out is uncertain. Anderson doesn't see another significant loss like we saw Friday. He said in the next three to six months, the markets could see small gains overall.