The currency dived as much as 4.85 per cent to an unprecedented $1.0327, extending a 3.61 per cent dive from Friday, when finance minister Kwasi Kwarteng unleashed historic tax cuts, and the biggest increase in borrowing since 1972 to pay for them.
Economists and investors said Prime Minister Liz Truss's government, in power for less than three weeks, was losing financial credibility in unveiling such a plan just a day after the Bank of England hiked interest rates to contain surging inflation.
Sterling was last down 2.7 per cent at $1.0560.
Marc Chandler, chief market strategist at Bannockburn Global Forex, called the currency’s record plunge ‘incredible’. “The weekend press tarred and feathered sterling with assertions of its emerging-market status,” he said. “I don’t buy that schadenfreude. Still, there is now bound to be speculation of an emergency BOE meeting and rate hike.”
Kwarteng’s announcement marked a step change in British financial policy, harking back to the Thatcherite and Reaganomics doctrines of the 1980s that critics have derided as a return to ‘trickle down’ economics.
The so-called mini budget is designed to snap the economy out of a period of double-digit inflation driven by surging energy prices and a 15-year run of stagnant real wage growth.
In total, the plans will require an extra 72 billion pounds of government borrowing over the next six months alone.
British government bond yields surged by the most in a day in more than three decades on Friday, with yields on the five-year gilt - one of the most sensitive to any near-term shift in interest rate or borrowing expectations - up by half a percentage point.
"When we see those gilt markets open a little later on, we're probably going to see a pretty sharp spike," said Chris Weston, head of research at Melbourne-based brokerage Pepperstone.
"In this environment, you either need to see much higher growth - which isn't happening at the moment - or you need to see significantly higher bond yields to incentivise capital inflows. To get bond yields up to those levels, you need to see the Bank of England coming out and doing an emergency hike."
China raises forex risk reserve ratio to 20%
China made it more expensive to bet against the yuan with derivatives, ramping up support for the currency as it slides toward the weakest level against the dollar since the 2008 global financial crisis.
The People’s Bank of China said Monday it’ll impose a risk reserve requirement of 20 per cent on currency forward sales by banks.
Since August, the central bank has sought to limit the yuan’s losses through its daily reference rate as well as demanding that lenders set aside more foreign exchange as reserves.
The decline of the yuan is accelerating as divergence grows between a dovish PBOC and and an aggressively hiking Federal Reserve.
China’s push-back mirrors that of Japan, with both seeking to limit the damage from their weakening currencies, with the risks that further declines may lead to ever more capital outflows and drag down the region.
The decline of the yuan is accelerating as divergence grows between a dovish PBOC and and an aggressively hiking Federal Reserve. Bloomberg
 "An employee is seen walking over a mosaic of pound sterling symbols set in the floor of the front hall of the Bank of England in London. (Photo: Reuters)")