It was a rough day for investors on Wall Street as the Dow sank over 800 points, but financial advisors are warning people not to get too nervous.

Mitch Goldberg, of ClientFirst Strategies, says it's easy to make poor decision during downswings in the market.

"In times of stress is when investors tend to make emotional decisions, which is what financial advisors will council not to do," Goldberg says.

He is telling his clients to stay the course because things could get worse before they get better.

Goldberg says in most cases, people should just keep investing in their 401K, and the dollar cost average doesn't change based on market conditions.

Long Islanders are hoping that things will take a turn for the better.

"Definitely makes me nervous and hopefully it goes back up," says Mohammed Faiq, of Plainview.