Wall Street rout: Dow down 416

NEW YORK — Stocks plummeted today, briefly hurtling the Dow Jones industrials down more than 500 points as Wall Street succumbed to a global market plunge sparked by growing concerns that the U.S. and Chinese economies are cooling and that equities prices have become overinflated.

A 9 percent slide in Chinese stocks, which came a day after investors sent Shanghai's benchmark index to a record high close, set the tone for U.S. trading. The Dow began the day falling sharply, and the decline accelerated throughout the course of the session before stocks took a huge dive in late afternoon as computer-driven sell programs kicked in.

The Dow fell 546.02, or 4.3 percent, to 12,086.06 before recovering some ground in the last hour of trading. Because the worst of the plunge took place after 2:30 p.m., the New York Stock Exchange's circuit breakers, designed to halt precipitous moves, were not activated.

At the close, the Dow was down 416 points and the tech-heavy Nasdaq had lost 97. The losses for the Dow, Nasdaq and S&P 500 all topped 3 percent for the day.

Investors' dwindling confidence was knocked down further by data showing that the economy may be decelerating more than anticipated. A Commerce Department report that orders for durable goods in January dropped by the largest amount in three months exacerbated jitters about the direction of the U.S. economy, just a day after former Federal Reserve Chairman Alan Greenspan said the United States may be headed for a recession.

"It looks more and more like the economy is a slow growth economy," said Michael Strauss, chief economist at Commonfund. "Moderate economic growth is good — an abrupt stop in economic growth scares people."

The market had been expecting the government on Wednesday to revise its estimate of fourth-quarter GDP growth down to an annual rate of about 2.3 percent from an initial forecast of 3.5 percent, and grew increasingly nervous on today that the figure could come in even lower.

The housing market, which the Street had been hoping had bottomed out, also looked far from recovery after a Standard & Poor's index indicated that single-family home prices across the nation were flat in December. A later report from the National Association of Realtors said existing home sales climbed in January by the largest amount in two years, but the data didn't erase housing-related concerns, as median home prices fell for a sixth straight month.

Just a week ago, the Dow had reached new closing and trading highs, rising as high as 12,795.92.

A suicide bomber attack on the main U.S. military base in Afghanistan where Vice President Dick Cheney was visiting also rattled the market.

China's stock market plummeted today from record highs as investors took profits when concerns arose that the Chinese government may try to temper its ballooning economy by raising interest rates again or reducing more of the money available for lending.

"Corrections usually happen because of a catalyst, and this may be it," said Ed Peters, chief investment officer at PanAgora Asset Management. "The move in China was a surprise, and when a major market has a shock it ripples through the rest of the market. With all the trade that goes on with China, there tends to be a knee-jerk reaction with that kind of drop."

The Shanghai Composite Index tumbled 8.8 percent to close at 2,771.79, its biggest decline since it fell 8.9 percent on Feb. 18, 1997. Since Chinese share prices doubled last year as investors poured money into the market after the completion of shareholding reforms, trading in Shanghai has been very volatile.

Hong Kong's benchmark Hang Seng Index dropped 1.8 percent, and Malaysia's Kuala Lumpur Composite Index fell 2.8 percent. Japan's Nikkei stock average fell a more moderate 0.52 percent, but European markets were rattled — Britain's FTSE 100 lost 2.31 percent, Germany's DAX index dropped 2.96 percent, and France's CAC-40 fell 3.02 percent.

Bond prices shot higher as investors bought into the safe-haven Treasury market, pushing the yield on the benchmark 10-year Treasury note down to 4.47 percent, its lowest level so far this year, from 4.63 percent late Monday. The bond buying was sparked primarily by the durable goods orders, which the Commerce Department said fell 7.8 percent, much more than what the market expected.

The durable goods drop raised the chance of the Federal Reserve easing interest rates later in the year — a possibility that makes the bond market an attractive place to be right now.

The hope for slowing inflation could be dashed, though, if energy costs keep rising. Oil prices initially fell today on worries that Chinese demand could be dampened should its economy slow down, but later rose on escalating tensions in the Middle East. Light, sweet crude for April delivery fell 62 cents a barrel to $60.77 on the New York Mercantile Exchange.

The dollar slipped against other major currencies, while gold also fell.

The Dow has been climbing at a steady rate since last summer, but over the past few trading sessions, stocks have pulled back on the worry that the market is due for a correction. Many analysts have noted that the Dow hasn't seen a 2 percent decline in more than 120 sessions.

Data indicating a slower economy had recently been giving stocks a boost on the hopes that the Fed will lower interest rates, which could reinvigorate consumer spending and the struggling housing market. But the market may fall further before that happens, analysts said.

"If in a week or two, the psychology in the U.S. market turns to the realization that we're in a modest growth economy of 2 to 3 percent growth, that will help temper inflation pressures going forward. If that perception evolves, there's an increase in the likelihood that the Fed will be lowering rates rather than raising rates. Structurally, it's a development that should be good for the equity market, but it might be an event that unfolds after prices are lower," Strauss said.

Declining issues outnumbered advancers by about 7 to 1 on the New York Stock Exchange, where volume came to 1.39 billion shares.

No sector was left unscathed by today's sell-off, and all of the 30 Dow components were lower in early afternoon trading.

The Russell 2000 index of smaller companies dropped 26.64, or 3.23 percent, at 797.05.

NYSE-listed shares of Chinese companies plunged. China Mobile Ltd. tumbled $3.39, or 6.9 percent, to $45.89. Mindray Medical International Ltd. dropped $3.69, or 12.85 percent, to $25.02. China Eastern Airlines Corp. fell $4.435, or 13.14 percent, to $29.315.

On the Nasdaq, Internet company Baidu.com Inc. fell $4.44, or 4 percent, to $107.27. Shanda Interactive Entertainment Ltd., which develops online games, fell $1.42, or 5.7 percent, to $23.50.