Global investors have given the $1.5 trillion (£1.02 trillion) US bank bail-out plan a muted response, following sharp falls overnight on Wall Street.
Analysts says there is scepticism over whether the proposal will work, and worries over both a perceived lack of detail and the sums of money involved.
At the core of the plan is a new $500bn fund to absorb toxic bank assets.
The UK’s FTSE 100 was down 0.4% in early trading. America’s main Dow Jones slumped 4.6% on Tuesday.
"This is not a clear-cut plan," said analyst Bucky Hellwig.
Mr Hellwig, who works for Morgan Asset Management, added that it wasn’t "what investors are looking for", and that the package was "convoluted".