The number of Americans filing for unemployment benefits dropped to a nine-month low last week, suggesting a tightening labor market would continue to keep the longest economic expansion in history on track despite weak business investment.

While other data on Thursday showed worker productivity rebounding in the fourth quarter, the trend remained sluggish, indicating that the economy will probably remain on a moderate growth path.

Lackluster productivity is squeezing corporate profits. Economists say this could make businesses, which have already cut back on capital expenditures, cautious about hiring.

"Compression of profit margins usually precedes a recession, as it causes businesses to become more cautious," said Ryan Sweet, a senior economist at Moodys' Analytics in West Chester, Pennsylvania. "This is likely one factor behind the recent weakness in business investment."

Initial claims for state unemployment benefits decreased 15,000 to a seasonally adjusted 202,000 for the week ended Feb. 1, the lowest reading since last April, the Labor Department said.

Economists polled by Reuters had forecast claims dipping to 215,000 in the latest week. The Labor Department said only claims for Alabama and Pennsylvania were estimated last week.

The four-week moving average of initial claims, considered a better measure of labor market trends as it irons out week-to-week volatility, fell 3,000 to 211,750 last week, also the lowest level since last April.

The claims data has no bearing on January's employment report, which is scheduled for release on Friday, as it falls outside the survey period. Claims were lower in January relative to December, suggesting a pick-up in job growth.

According to a Reuters survey of economists, nonfarm payrolls likely increased by 160,000 jobs in January after rising 145,000 in December. Employment gains could, however, exceed expectations given unseasonably mild weather, which could have boosted hiring at construction sites and in the leisure and hospitality industry.

The ADP National Employment report on Wednesday showed private payrolls surged by 291,000 jobs in January, the most since May 2015, after increasing 199,000 in December.

The dollar firmed marginally against a basket of currencies, while U.S. Treasury prices fell. Stocks on Wall Street were trading higher, with investor sentiment buoyed by China's plan to slash additional tariffs on some American goods by 50%.

WARNING SIGNS

Labor market strength is helping to underpin consumer spending, supporting the economy, now in its 11th year of expansion. But tepid productivity remains a challenge and is one of the reasons the economy has struggled to achieve the Trump administration's target of 3% annual growth.

The economy grew 2.3% in 2019, the slowest in three years, after logging 2.9% in 2018.

In another report on Thursday, the Labor Department said nonfarm productivity, which measures hourly output per worker, increased at a 1.4% annualized rate last quarter.

Productivity decreased at an unrevised 0.2% pace in the July-September period, the biggest drop since the fourth quarter of 2015. Economists had forecast productivity rebounding at a 1.6% rate in the fourth quarter.

Compared to the fourth quarter of 2018, productivity increased at a 1.8% rate. It accelerated 1.7% in 2019, the strongest since 2010, after increasing 1.3% in 2018.

Productivity increased at an average annual rate of 1.3% from 2007 to 2019, below its long-term rate of 2.1% from 1947 to 2019, indicating that the speed at which the economy can grow over a long period without igniting inflation has slowed. Economist estimate the economy's growth potential at 1.8%.

"A lot of an economy's productivity gains are dependent on investment spending and it is a concern that businesses are making fewer capital expenditures to prepare for growth later this year and beyond," said Chris Rupkey, chief economist at MUFG in New York.

Despite the low level of jobless claims, there are some warning signs flashing for the labor market. Job cuts announced by U.S.-based employers jumped 106% to an 11-month high of 67,735 in January, global outplacement firm Challenger, Gray & Christmas said in another report on Thursday.

The surge in layoffs was led by technology companies, with 13,869 planned job cuts. There were also redundancies in the retail sector last month, many because of bankruptcies and store closings. Manufacturers, which have been hurt by trade tensions and slowing global growth, continued to shed workers.

The Labor Department's annual benchmark revisions to payrolls data to be published on Friday are expected to show some cooling in the jobs market.

The government last August estimated the economy created 501,000 fewer jobs in the 12 months through March 2019 than previously reported, the biggest downward revision in the level of employment in a decade. That suggests job growth over that period averaged around 170,000 per month instead of 210,000.

Economists say the size of the estimated revision suggests that payrolls data from April 2019 through March this year could also be revised lower.

But the pace of job gains is more than the 100,000 per month needed to keep up with growth in the working age population. The unemployment rate is forecast unchanged at 3.5% in January.