WASHINGTON (MarketWatch) -- Planned layoff announcements at major U.S. corporations increased 59% in January, reaching 71,482 from a nine-year low of 45,094 seen in December, according to the latest job-cut tally by Challenger Gray & Christmas.

It was the first month-to-month increase in layoffs since July, the outplacement firm reported Wednesday. The figures are not seasonally adjusted.