It is customary to say that past success isn't a guarantee that a company will continue down that path -- a true statement. However, a corporation's track record provides vital information about its capabilities that helps decide whether it's worth investing in. That's why looking at a company's past can be useful.

With that said, let's look at a leading biotech that has delivered excellent returns over the long run: Vertex Pharmaceuticals (NASDAQ: VRTX). Just how great has the drugmaker's performance been? Read on to find out how much a $10,000 investment in Vertex 10 years ago would be worth today and what it means for investors.

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Source Fool.com