Apple shocking Wall Street last night announcing Tim Cook will step down as CEO in September.

Cook will become executive chairman, and John Turnus, the senior vice president of hardware engineering,

will become CEO on September 1st. The announcement coming earlier than expected.

Apple's shares are lower today but have risen nearly 2,000 percent since Cook became CEO in 2011.

The total return, including dividend reinvestments, 2,400 or so during his reign.

A $10,000 investment in Apple when he took over would be worth around $210,000 today.

Apple's market cap was under $350 billion back then. Now it's $4 trillion. The reaction from

analysts is pretty positive so far with Ternus seen as a continuity candidate. For more, let's

bring in John Ford. John, you've spoken with some tech leaders for their thoughts on what

this, what impact this could have?

Yeah, and it was more on the impact of these big transitions in general, Kelly, because Tim Cook is just a phenomenal figure, maybe even a singular figure in the history of technology.

The reason why I say that, he will have been CEO for 15 years,

but even before that, he was Steve Jobs' right-hand man who made the vision of Apple technology

actually scaling and being globally successful. He made that possible through fixing those

logistical supply chain inventory problems that had plagued Apple up into that point.

And so it's really interesting now to see Apple taking this internal candidate who's been at Apple for a quarter century and having John Turnus in this seat.

It speaks to continuity and speaks frankly, I think, to a confidence that works against sort of this

Apple isn't ready for AI narrative.

Or kind of quoting the analysts.

The continuity candidate was an indication that products will continue to be Apple's future.

But there seems to be this underlying read that perhaps frustration with the continuity that we're

seeing right now is why Cook is leaving. And do they need to speed up the timeline and shake

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