NEW YORK (Reuters) - Investors dumped commodities and stocks on Monday in a broad selloff that gave gold its worst two-day loss in 30 years after weak demand figures from China fanned concerns the world economy is stumbling.
Gold dragged other metals lower as its price plunged to a more than two-year low. Brent crude fell towards $100 a barrel, while on Wall Street stocks dropped more than 2 percent for the S&P 500's worst day since November 7.
With the market already vulnerable, U.S. stocks extended losses late in the session after two explosions struck near the Boston Marathon finish line. Boston police said the blasts killed two people and injured 23.
Spot gold dropped as much as 9 percent on Monday alone, falling as low as $1,336.04 an ounce. In the last two sessions gold has fallen over 13 percent, for the worst two days since late February 1983. Gold was recently at $1,346.26.
Strategists have cited various reasons for gold's slump, including plans by Cyprus to sell excess gold reserves and feared selling from other central banks.
The already sharp correction has caused short-term investors to flee the asset. The SPDR Gold Trust hit its highest ever daily volume with 92.44 million shares traded. The ETF lost 8.8 percent.
"The pressure from the proposed sale of Cyprus gold is one of the factors, and once one of them starts, they all run from the hen house," said Robert Richardson, senior account executive and trading officer at Canadian broker-dealer W.D. Latimer Co. Ltd.
China's recovery unexpectedly stumbled in the first three months of 2013, as it reported its annual growth rate eased to 7.7 percent from 7.9 percent in the final quarter of last year. Economists had forecast 8 percent growth.
Industrial output in China in March also undershot expectations and added to investor sensitivity after recent disappointing economic data out of the United States.
A U.S. regional manufacturing report on Monday showed the pace of growth slowed, the latest data to suggest the world's biggest economy lost some steam heading into the second quarter.
"China makes up 40 percent of demand for base metals and all the growth in demand for oil is coming from the developing world, so to see weakness in China is bad for commodities generally," said Nic Brown, head of commodities research at Natixis in London.
Last week Cyprus revealed it would sell around 400 million euros worth of gold to help shore up its ailing finances and the move has sparked suggestions that larger countries in the region could use the move to cash in on some huge jumps gold has seen over the last decade.
Traders also cited concern that the Federal Reserve might reduce U.S. monetary stimulus towards the end of the year.
"If we see this kind of liquidation again, the equity market will follow. Then we'll have a real problem," said Frank Cholly, Jr., senior commodities broker at R.J. O'Brien and Associates in Chicago.
"If we turn into a bear market and this isn't just a correction, sentiment may really sour. There is no one buying and picking a bottom yet."
Brent crude futures dropped more than $2 to $100.39 a barrel as the disappointment stirred already festering global recovery concerns. U.S. crude settled down $2.58 at $88.71.
Copper fell to its lowest in 1-1/2 years. Three-month copper on the London Metal Exchange fell to $7,085 a tonne in intraday trade, its lowest since October 2011.
Silver lost 12 percent at $22.71 an ounce, having fallen as low as $22.56.
U.S. stocks also fell heavily across the board.
"The adverse feedback loop of all these things ... that's spilling over to stocks and that's something most investors don't want to get in front of. So we've seen selling really dominate the day today," said Bucky Hellwig, senior vice president at BB&T Wealth Management in Birmingham, Alabama.
The Dow Jones industrial average dropped 265.86 points, or 1.79 percent, to close at 14,599.20. The Standard & Poor's 500 Index lost 36.49 points, or 2.30 percent, to end at 1,552.36. The Nasdaq Composite Index fell 78.46 points, or 2.38 percent, to 3,216.49.
The FTSEurofirst 300 ended down 0.6 percent and MSCI's world share index, which tracks stocks in 45 countries, lost 1.8 percent.
The yen rose as traders sold riskier investments funded by the cheap Japanese currency. The dollar fell 1.2 percent to 96.61 yen. The euro fell 2.2 percent to 125.98 yen.
Additional reporting by Chuck Mikolajczak, Richard Leong and Manuela Badawy in New York; Editing by James Dalgleish