The Japanese companies’ decision to call off negotiations highlights the challenges legacy automakers face in partnering to tackle new technologies.

With the Nissan-Honda merger officially dead, Nissan is now moving forward with its own restructuring plan.That means deep job cuts, plant closures, and a more aggressive approach to development cycles as the company attempts to regain stability.

U.S.-based hedge fund Viking Global built a $526 million-worth new position in planemaker Boeing in the fourth quarter, with 2.9 million shares, and roughly doubled bets on JPMorgan Chase, a regulatory filing showed on Friday.