Hearing-Aid Stocks Face Uncertain Road After Game-Changing Deal

A potentially game-changing deal in the hearing-aid industry is poised to increase pressure on some of Europe’s worst-performing health care shares.

Amplifon SpA’s plan to acquire GN Store Nord A/S’s hearing-aid unit triggered big moves in both stocks this week, and raised concerns that it will dent rival producers such as Sonova Holding AG and Demant A/S in a sector grappling with slow demand and rising competition.