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The stock market swings can make you stressed about your investments.

If you followed in the footsteps of self-made billionaire Warren Buffet, you shouldn't be too concerned about daily market moves.

If you're comfortable with the holding, you can buy a stock that goes down 50% or more.

The greatest investor in the world is the 91-year-old. Only one of the top 10 billionaires has gained wealth so far this year, and that is Warren Buffet.

There are two income-oriented strategies to protect and grow wealth in the market.

When he looks at the stock market, he sees companies.

We run our eyes over what we see. At the 2008 meeting, Buffett said that he sees something that looks like it is attractively priced to be a business.

If you want to follow in the footsteps of Warren Buffet, here are some of his key principles.

When he buys stock, he's in it for the long haul.

Robert Johnson is a professor of finance at the Heider College of Business in Omaha, Nebraska, and he said patience is one of the qualities that you need in order to invest in Warren Buffet.

You’ve got to be prepared when you buy a stock to have it go down 50% or more and be comfortable with it, as long as you’re comfortable with the holding.

Over the years, he has driven this philosophy home.

If the market was going to close for a couple of years, we would be happy with the stock we buy. He has said that they look at the business.

He compared it to buying a farm.

You would not get a price on it every day and you wouldn't ask if the yield was up or down. You would look at what the farm was going to produce.

Never invest in a business that you can't understand, that's what Warren Buffet said.

You have to learn how to value businesses and know the ones that are within your circle of competence and the ones that are outside, according to Warren Buffet.

He doesn't think you have to be an expert on every company.

He wrote in his 1996 annual shareholders letter that investors need the ability to evaluate businesses correctly.

Johnson said that he likes to focus on companies that have a good business model that is sustainable over a long period of time.

The price has to be right. A value investor is someone who chooses equities that seem to be trading for less than their intrinsic value.

It's better to buy a great company at a great price than a great company at a great price, he wrote in his annual letter to shareholders.

Warren Buffett, chairman of Berkshire Hathaway Inc., right, and Bill Gates, chairman and co-founder of Microsoft Corp., participate in a newspaper toss event at the Berkshire Hathaway annual shareholders meeting on Saturday, May 5, 2012.

Constantly learning is something that is important to Warren Buffet.

When he was 10 years old, he read every book on investing in the Omaha public library and many of them twice.

He hasn't stopped.

Several years ago, he was in his office. His desk is full of books and they are all on different topics.

He once said he reads 500 pages a week.

The idea of reading everything in sight is something that is very important to me.