[Apple’s stock price soared 2,275% during the Cook era, and Turners’ succession faced a high standard test] September 1st, Apple CEO Cook handed the reins to John Turners on Tuesday, bringing an end to his tenure. During his tenure at Apple, Cook not only consolidated the company's status as a global iconic brand, but also made Apple stock one of the most reliable investment targets in the market. Since Cook took over from legendary founder Steve Jobs on August 24, 2011, Apple's stock price has risen by 2,275%. At the time, he took over a company with a market value of less than $350 billion. Today, the company that produces iPhones and Mac computers has grown into a diversified technology giant with a market value of $4.6 trillion, and its business also covers areas such as Apple Watch, AirPods, and financial services. Turners will soon face his first big test. He is expected to launch a folding screen version of the iPhone, as well as other product updates, at a key conference next week.