About 339,000 people filed for first-time unemployment benefits in the week ended October 6, down 30,000 from the previous week, the Labor Department said Thursday.
That's a dramatic drop in just one week and represents the lowest level of initial claim filings since February 2008.
The weekly claims figure is often seen as a proxy for layoffs, so when it drops, it's considered an encouraging sign that the job market is improving. But the figure is extremely volatile and has failed to hold a consistent trend this year.
Much of the drop last week was caused by an anomaly, a Labor Department analyst told CNNMoney. One state posted a large decline in claims, which is not typical during the last week in September.
The drop probably occurred because that state didn't fully process end-of-quarter claims, the Labor Department analyst said. If that's the case, it's possible initial claims could shoot back up next week, once those claims are processed.
Usually, most states report a rise in initial claims at the end of the quarter. The Labor Department seasonally adjusts its figures to account for those trends, but this year the rise was smaller than expected because of that state.
Many economists initially speculated that the state in question was California, though California's Employment Development Department issued a press release later Thursday saying it had reported all unemployment data on time and had no backlog of claims.
The Labor Department publishes the breakdown of claims by state next week, which may shed more light on the issue.
The latest jobless claims figures come less than a week after a strong monthly jobs report raised eyebrows and unleashed a political firestorm, with former GE CEO Jack Welch alleging that the numbers were manipulated. There's no evidence of any misconduct and Labor Secretary Hilda Solis has called the conspiracy theories "insulting."
The report showed the unemployment rate fell to 7.8% in September, the lowest rate since President Obama was inaugurated in January 2009.
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