In Germany, wholesale prices dropped 8 percent in March from a year ago, the steepest fall since 1987. In Japan, wholesale prices fell 2.2 percent on an annual basis. In the United States, the Consumer Price Index fell 0.4 percent in March, year over year, though prices rose 0.2 percent excluding food and energy.

“It doesn’t mean it will spread here to the U.S., but we need to look closely at Spain and other places to understand the dynamic,” says Simon Johnson, a professor at the Sloan School of Management at the Massachusetts Institute of Technology and a former chief economist for the International Monetary Fund. “It’s like the front line of a new virus outbreak.”

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The trends have unnerved even well-established businesses. “There is such a huge lack of confidence in the politicians, in the European Union and in the banks,” said Arturo Virosque, 79, president of Valencia’s chamber of commerce and the owner of a local logistics company. Ticking off crises going back to the Spanish Civil War in his youth, he said, “this is different. It’s like an illness.”

After price cuts by competitors, Mr. Virosque’s company reduced charges for storage and transportation, and slashed its work force to about 170, from 250. “The worst thing is that we have to cut the young people,” he said, because higher severance makes it too expensive to fire older workers.

While unemployment traditionally is higher in Spain than in much of Europe, the sharp increase has many here nervous. The jobless rate for those under 25 is at a Depression-like level of 31.8 percent, the highest among the 27 nations of the European Union.

Before cutting prices in early 2009, Mr. Maestre ordered several rounds of job cuts at his company, Fermax, as sales of the intercoms collapsed with Spain’s housing bubble.