Japan’s No. 2 Mobile Carrier Falls After Massive Outage

Japan’s second-largest mobile carrier by subscribers fell in Tokyo trading after a nationwide disruption of its services over the weekend. As many as 39 million mobile lines were affected, preventing users from making calls or using data services, until the network was almost fully restored Monday afternoon.

KDDI Corp., in an unusually large swing for a typically stable stock, dropped as much as 3.9%, its biggest intraday fall since March 30. Shares pared their losses by the close, falling 1.7%, but still trailed the Topix index’s 1.3% gain.