Why Amazon and others are in a bidding war for home health tech

The bidding war over Signify Health — a health technology business that could fetch multibillion-dollar offers from Amazon, CVS, and UnitedHealth Group — is not about its dazzling software or a blockbuster AI algorithm.

The crush of corporate interest, experts said, stems from something much bigger: the opportunity to move medical services back into the home. In-home care is quickly becoming the biggest battlefield in America’s biggest business, with a huge array of companies seeking to move health care outside the institutional walls that have confined it for much of the last century.