Acer shares opened down 6.9 percent, the maximum allowed in a session, at T$16.9, in a broader market that was up 0.2 percent.

Citi cut Acer's target price to T$13 after the announcement, saying the restructuring efforts could not change the PC company's outlook structurally, but reducing operating expenses through headcount reduction could buy time for management to reposition its business model.

(Reporting by Clare Jim; Editing by Chris Gallagher)