The UK financial market today threatened to fall at its sharpish rate since the terrorist attacks on September 11, 2001, as the growing likelihood of a US recession wreaked havoc across the globe.

About £77 billion was wiped from UK blue chip share values today, when it lost as much as 330 points as fears of a US slowdown gripped investors worldwide.

Towards the end of trading, the FTSE 100 had fallen by 268.6 bringing the index to 5,633.5. On September 11, 2001, the FTSE lost 287 points in one trading session.

In Asia overnight trading drained cash from the Tokyo and Hong Kong markets while in Europe, Germany's Dax closed down nearly 6 per cent at 6,922.7 while France's CAC-40 Index lost 4.5 per cent to 4,861.2.

In the UK, mining companies, retailers and banks bore the brunt of the markdown in prices as dealers decided that President George W Bush's proposed stimulus package for the US economy, that was revealed last week, would not be enough.

America's Dow Jones was closed today for a public holiday.

The threat that the credit ratings of monoline insurers - which insure bond investors against default - could be downgraded added to the general anxiety.

The Nikkei 225 Index of Japanese blue chips fell more than 3.5 per cent, while the Hang Seng declined by nearly 3 per cent in a grim afternoon session.

Much of the damage in Hong Kong was wrought by fears that the Bank of China may be on the verge of a substantial writedown of investments in the US mortgage market.

But the chief culprit, said brokers, appeared to be the inadequacy of President Bush's stimulus package. The $140 billion (£71.8 billion) proposal was larger than most predicted, but a weekend of reflection caused many investors to conclude that it was not enough to insulate the US from recession.

Also, in Tokyo there were rumours that several large funds may have pulled out of Japan altogether.

“Even government ministers have begun to question the nation’s future status as an economic powerhouse, and the gloom has translated directly into 'sell' orders,” said one Daiwa Securities broker.

Equally potent was the suggestion that the proprietary funds of several large European banking houses may also have sucked capital out of Japan in a hurry.

Funds worth as much as $4 billion are thought to have been closed down altogether as banks have liquidated their Japan positions to make up capital adequacy ratios at head offices in Paris or Frankfurt.

Lurking behind the day’s sell-off is growing panic that US-based bond insurance companies are facing ratings downgrades by the likes of Moody’s and Standard & Poor’s.

Without the highest quality endorsement of the ratings agencies, runs the logic, a whole tranche of investment capital committed to only triple-A rated assets will be forced to sell off the bonds insured by the downgraded companies.

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