Warren Buffett is regarded as one of the world's greatest stock market investors, and is the largest shareholder and CEO of Berkshire Hathaway. He was ranked by Forbes as the richest person in the world as of February 11, 2008, with an estimated net worth of around US$62 billion and he was called "The Oracle of Omaha" for his impressive investing prowess.

Warren Buffett descends from the Benjamin Graham school of value investing. Value investors look for securities with prices that are unjustifiably low based on their intrinsic worth. When discussing stocks, determining intrinsic value can be a bit tricky as there is no universally accepted way to obtain this figure. Most often intrinsic worth is estimated by analyzing a company's fundamentals. Like bargain hunters, value investors seek products that are beneficial and of high quality but underpriced. In other words, the value investor searches for stocks that he or she believes are undervalued by the market. Like the bargain hunter, the value investor tries to find those items that are valuable but not recognized as such by the majority of other buyers.

Warren Buffett's investment strategy of discipline, patience and value consistently outperforms the market and his moves are followed by thousands of investors worldwide. Buffett seeks to acquire great companies trading at a discount to their intrinsic value, and to hold them for a long time. He will only invest in businesses that he understands, and always insists on a margin of safety.

Regarding the types of businesses Berkshire likes to purchase, Buffett stated: "We want businesses to be one (a) that we can understand;
(b) with favorable long-term prospects; (c) operated by honest and competent people; and (d) available at a very attractive price."

Individual investors have their own unique perspectives of businesses they understand. Combining the strategy of following Warren Buffett stock picks and personal knowledge, an investor can beat Wall Street.