Author Bio John covers consumer goods and technology companies for Fool.com. One way to spot future wealth-building stocks is to look for relatively small companies in their respective industry that have consistently posted high growth rates. Ideally, look for companies that have a much larger addressable market than their current annual revenue. This is a good indicator that the company has plenty of headroom to grow and can likely maintain its high growth rate for many years and fuel a big return for investors. Two companies that meet these criteria are Farfetch Limited (NYSE:FTCH), the leading global online luxury goods seller, and