Samsung and the NSEU returned to mediation in Sejong on Monday with three days left before an 18-day strike. The bonus formula, not the size of the offer, is the line the deal will turn on.

Samsung offered unconditional union talks on Friday. The NSEU said yes, on 7 June, three days after its 18-day strike ended. Shares fell as much as 7.6%.

Samsung Electronics shares fell 9% as its labor union pushed ahead with an 18-day strike amid stalled wage talks.