How Big Tech is muscling in on health care — we rank the strategies of our 4 core holdings

They're all vying for a slice of the more than $4 trillion that Americans spend each year on their health.

How Big Tech is muscling in on health care — we rank the strategies of our 4 core holdings

Customers try Apple Watch devices in the Apple Marunouchi store on September 07, 2019 in Tokyo, Japan.

Tomohiro Ohsumi | Getty Images