McDonald's is the oldest American fast food chain. Founded in 1940, today the brand is represented in over 100 countries and is considered one of the most popular restaurants in the world.The McDonalds' menu includes hamburgers, fries, chicken nuggets, salads, smoothies and many more fast food products. Over 80% of McDonald's restaurants throughout the globe are franchises, managed by independent entrepreneurs. Their revenue is derived from royalties, the fees from the franchises and from the sales themselves.McDonald's is listed on the New York stock exchange and constitutes the DJIA, S&P 500 and the S&P 100 indices.