American Express Co. said late Monday that it would cut an additional 4,000 jobs, or 6% of its staff, to save another $800 million.

The New York card company said last month that it planned "to initiate additional reengineering efforts" during this quarter in order to reduce operating costs. In October, it laid off 7,000 employees, or 10% of its workforce, and froze salaries and hiring as part of $1.8 billion in cost cuts.

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