How golden was Tim Cook's Apple?

Data: Financial Modeling Prep; Chart: Erin Davis/Axios Visuals Apple CEO Tim Cook hands the reins over to John Ternus Tuesday, stepping down after 15 years of running the company. Why it matters: He had an epic run. By the numbers: When Cook took over in August 2011, Apple's stock was trading at $13.35. It closed at $316.61 on Monday. Zoom in: That 2,272% gain easily outpaced the growth of the major stock indexes. The company's market cap — the value of all its outstanding shares — is now…