Japan’s earthquake and nuclear crises have put pressure on the already fragile global economy, squeezed supplies of goods from computer chips to auto parts and raised fears of higher interest rates.

The disaster frightened financial markets Tuesday in Tokyo and on Wall Street. Japan’s Nikkei average lost 10 percent, and the Dow Jones industrials fell so quickly after the opening bell that the stock exchange invoked a special rule to reduce volatility.

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A photographer takes a photo of a stock price board in a street on Tuesday in Tokyo, Japan. Japan's Nikkei stock index nose-dived nearly 11 percent Tuesday as the earthquake-shattered country faced an unfolding nuclear crisis. 9.0 Magnitude Earthquake,Destruction,Devastation,Disaster,Earthquake,people,person,Ruin,Sendai Earthquake and Tsunami The Associated Press

Yet the damage to the U.S. and world economies is expected to be relatively moderate and short-lived. Oil prices are falling, helping drivers around the world. And the reconstruction expected along Japan’s northeastern coast could even provide a jolt of economic growth.

A weaker Japanese economy could help ease global commodity prices because Japan is a major importer of fuel, agricultural products and other raw materials, notes Mark Zandi, chief economist at Moody’s Analytics. Oil prices fell more than $4 to $97.18 a barrel Tuesday because of expectations that quake damage will slow Japan’s economy and reduce its demand for energy.

Even “assuming a drastic scenario,” Bank of America economist Ethan Harris estimates the disaster would shave just one-tenth of a percentage point off expected global economic growth this year.

“Japan has not been an engine of global or Asian growth for some time,” says Nariman Behravesh, chief economist at IHS Global Insight. “This means that the impact of much lower Japanese growth on the world economy will be probably limited and small.”

Japan is only half as important to the world’s economy as it was during its last major disaster, the 1995 Kobe earthquake. And the area hit hardest by Friday’s quake accounts for only about half as much economic output as the area damaged by the Kobe quake, the Organization for Economic Cooperation and Development estimates.

Japan proved resilient after the Kobe quake. Manufacturers returned to normal production levels within 15 months, according to the CLSA. Four in every five shops were back open in a year and a half. All told, Japan’s comeback defied dire warnings that it would take a decade to rebuild.

Autos and auto parts make up more than one-third of U.S. imports from Japan. As a result, shutdowns of Japanese auto factories could disrupt production at U.S. plants owned by Japanese automakers.

At the same time, some U.S. auto parts makers could benefit if Japanese plants in the United States substitute U.S. parts for those they usually get from Japan, Behravesh says.

A big wild card is the fate of Japan’s damaged nuclear power plants. The Fukushima Dai-ichi plant, the center of the concern, let off a burst of radiation on Tuesday. Radiation levels in the surrounding area subsided by evening, but unease in Japan did not.

“If the nuclear crisis turns into a full-blown catastrophe, then the negative effect on growth this year will be much larger,” said Behravesh at IHS.

Another unknown is the impact of the disruptions to Japan’s power supplies. Behravesh estimates about 10 percent of Japan’s electricity generation could be off line for several months. If so, that would disrupt steel, auto and other production.

Investors fear that Japan will struggle to finance reconstruction, which is expected to cost the government at least $200 billion. The Japanese government’s debt is already an alarming 225 percent of the country’s economic output.

Some worry that Japan will sell some of its vast holdings of U.S. government debt to raise money. Doing so would push the prices of U.S. Treasury bonds down and yields up, raising U.S. interest rates.

But Treasury Secretary Timothy Geithner on Tuesday dismissed the fears of a Japanese fire sale of Treasury debt.“Japan is a very rich country and has a high savings rate,” he said. It “has the capacity to deal not just with the humanitarian challenge, but also the reconstruction challenge they face ahead.”

For now, though, the latest quake, the resulting tsunami and the threat of contamination from a damaged nuclear plant have spooked financial markets. Investors are fretting about the effects on companies around the world. Japan, the world’s third-largest economy, accounts for about 10 percent of U.S. exports.
 

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