Samsung Electronics shares jumped on Thursday after a last-minute deal with a South Korean union prevented a strike.
The planned 18-day strike by 48,000 union members has been suspended. The agreement will be voted on from May 22 to 27.
Samsung accounts for a quarter of South Korea's exports. Analysts say the deal raises labor costs but paying bonuses in stock eases the burden.
Special bonuses for memory chip workers include up to $416,000, mostly in stock.
