WASHINGTON — U.S. hiring stumbled in May as employers added just 75,000 jobs, a sign that businesses have become more cautious in the face of weaker global growth, widening trade conflicts and perhaps some difficulty finding enough workers.

Last month’s modest job gain followed a much healthier increase of 224,000 in April. The Labor Department said Friday that the unemployment rate remained at a nearly 50-year low of 3.6 percent.

The tepid job growth, along with rising pressures on the economy, makes it more likely that the Federal Reserve will cut rates in the coming months. Bond yields fell after the jobs data was released, signaling expectations for lower Fed rates. Stock investors, too, signaled their approval, with the Dow Jones Industrial Average up nearly 300 points in late-day trading. At the close of trading the Dow Jones was up 263.28 points.

On Friday, the government also revised down the economy’s hiring gains for March and April by a combined 75,000. In the first five months of the year, job growth has averaged 164,000 a month, a solid pace that is enough to lower the unemployment rate over time. Still, it’s below last year’s pace of 225,000.

Last month, President Trump announced an increase in tariffs on $200 billion in Chinese imports from 10 percent to 25 percent. And last week, he threatened to impose 5 percent tariffs on all Mexican imports to the United States beginning Monday. Those taxes would rise each month until they reach 25 percent in October unless the Mexican government cuts off a flow of Central American migrants entering the United States through Mexico. But Trump declared Friday that “there is a good chance” the U.S. will strike a deal with Mexico to avert the tariffs.

The economy is showing signs of sluggishness just as the expansion has reached its 10th anniversary. Next month, it will become the longest period of uninterrupted growth on records dating to 1854. Yet consumers have turned cautious about spending, and companies are scaling back their investment in high-cost machinery and equipment.

Economists cautioned that May’s job figures cover just one month and that broader trends indicate that hiring remains steady. They also noted, though, that May’s weaker hiring data preceded Trump’s threat last week to impose 5 percent tariffs on Mexico. So the full impact of the trade fights will likely show up in coming months.

“This looks like an economy that is slowing down, which does not mean that we’re necessarily entering a recession,” said Martha Gimbel, director of economic research at the job listings site Indeed. “Coming in the context of tariffs and other economic headwinds makes this number more worrisome.”

The economy expanded at a healthy 3.1 percent annual rate in the January-March quarter. The Federal Reserve Bank of Atlanta estimates that annual growth will slump to 1.5 percent in the April-June quarter.

The deceleration in hiring could mean that some employers are just having trouble finding the workers they need, given that the pool of unemployed is comparatively small. Yet wages should be rising faster than they are as employers compete for workers.

Average hourly pay rose just 3.1 percent in May from a year earlier, down slightly from last month’s year-over-year gain of 3.2 percent. That was the smallest such annual increase since September. Smaller raises, combined with slower hiring, could diminish consumers’ willingness to spend in the coming months.

Hiring was weak across a broad range of industries in May. Manufacturers added only 3,000 jobs, a fourth straight month of anemic gains. Construction companies hired just 4,000, financial services only 2,000.

Employers in several industries cut payrolls. Retailers shed workers for a fifth straight month as stores struggle with online competition. A category that includes telecom, publishing, and media shed 5,000 jobs. Federal, state and local governments cut a combined 15,000.

Software and technology firms remain a bright spot. Paul McDonald, a senior executive at the staffing firm Robert Half International, said that mobile app developers, data analysts, coders, and senior financial analysts are still typically receiving multiple offers and strong pay gains.

“It’s still a job seeker’s market,” he said.

Keeper Security, a cyber-security firm, said last month that it would expand its Chicago headquarters and add 130 jobs over the next six months to its roughly 160 current staff.

CEO Darren Guccione said his company hasn’t had much trouble finding candidates to fill its programming, sales and marketing jobs. The company hires software developers in its Sacramento office, and is able to attract employees who are tired of the high cost of living in San Francisco.

“We’re seeing great pools of candidates,” he said.

Trade conflicts have had no impact on the company, Guccione added.

The tariffs have affected manufacturing and retail firms more than they have software companies and have become a growing threat to the economy.

The higher costs from the import taxes – and the potential for more – are causing some companies to scale back plans for spending, investment and expansion. A strong dollar, which makes U.S. goods costlier overseas, has also slowed the production and export of manufactured goods. Factory output fell 0.5 percent in April, according to a Fed report.

Automakers are cutting jobs and production as U.S. sales have declined. Analysts expect auto sales to fall below 17 million this year after four years above that level.