Samsung is expected to unveil a 1,000 trillion won ($647.5bn) decade-long investment in South Korea, with chip plants earmarked for outside Seoul.

Samsung Electronics plans a 90 trillion won buyback over three years, tied to a special bonus for its chip division. Shares rose more than 6%.

SEOUL, June 26 : Samsung Group will unveil a sweeping decade-long investment plan on Monday, pledging 1,000 trillion won ($648 billion) to anchor South Korea's next growth cycle,…