Monday, December 1, 2025

How shambolic Budget leak which threw financial markets in chaos would have enabled City traders to cash in

Must read

'Black hole lies' leave Reeves fighting for her job in worst crisis so far for Starmer Government

The Prime Minister was rallying to support his Chancellor after she had to deny on live TV that she had misled the public...

Major fast food chain saved in multimillion pound takeover as dozens of branches shut

Byron has been a staple on many British high streets with its specialty burgers, but a new takeover has meant that its seven remaining...

Mike Ashley’s Frasers to post update after grim warning

By EMILY HAWKINS Updated: 16:50 EST, 30 November 2025...

Lucas Paqueta slams FA in extraordinary outburst after red card against Liverpool: ‘Ridiculous’

Both were issued for dissent, with Paqueta furious after a decision made by referee Darren England. He continued to argue angrily with the...

Financial markets were thrown into chaos yesterday after a key analysis of Rachel Reeves’ measures leaked before she even stood up for her speech in Parliament – enabling City traders to cash in.

The value of the pound and UK government bonds swung wildly after economic forecasts from the Office for Budget Responsibility were published nearly an hour before the Chancellor delivered her spending plans to MPs.

The OBR is meant to deliver its forecasts after the Budget has been announced. Anger MPs sat in the Commons found themselves being without a document that was widely circulating outside of the Chamber.

Economist Laith Khalaf, from investment firm AJ Bell, said the unexpected release, as well as a spate of policy leaks ahead of Budget day, meant Ms Reeves’ speech was ‘a bit like watching Match of the Day when you already know the scores’.

Despite the chaos that engulfed Parliament following the leak, traders in the Square Mile closely monitoring these movements could have profited handsomely.

‘Almost anyone active in sterling rates or currency markets could theoretically have profited from the shambolic advance leak of the Budget,’ said Nick Lawson, head of merchant bank Ocean Wall.

Critical information: A key analysis of Rachel Reeves’ measures leaked before she even stood up for her speech in Parliament – enabling City traders to cash in

He said among those most poised to benefit from the wild swings would have been so-called ‘macro’ hedge funds, which make their money by betting on market movements caused by political and economic events.

Funds like these were big winners during the Brexit referendum when the Leave result caused the value of the pound to drop sharply.

Other possible winners were high-frequency trading firms, which use computer algorithms to make large numbers of trades extremely quickly, sometimes in fractions of a second, to stay ahead of competitors.

‘The Chancellor will certainly have been looking to give financial markets a silver lining to hold on to. But this won’t have been what she had in mind,’ Mr Lawson added.

The erroneous leaking of its forecasts threatens to deal a heavy blow to the OBR’s reputation, with the financial watchdog previously accused of wielding too much power over the government’s spending plans.

OBR chairman Richard Hughes told reporters that the forecast documents were ‘uploaded onto our website too early’ and that an investigation had been launched to uncover the reason behind the leak.

Pressed on whether he would resign, he said: ‘I will abide by the recommendations. I always serve so long as I have the confidence of the Chancellor and the Treasury committee.

‘We take it very seriously which is why we’ve initiated an investigation. At the moment, we understand how it happened but we want to get to the fundamental causes and make sure it doesn’t happen again.’

Asked about whether anyone had been disciplined, he said the OBR had been focused on its forecast, adding: ‘It was a mistake in the OBR. We have apologised for it. It’s not something which we like to happen. It was an accident.’

Last night a spokesman for the Chancellor said she still had confidence in Mr Hughes.

Sterling briefly spiked higher to nearly $1.32 against the dollar in the minutes after the leak as currency traders seized on signs the Chancellor had built herself more headroom.

However, it then plunged lower as international investors fretted over the outlook for the UK economy, before rebounding once again and passing $1.322 in late afternoon.

These movements were mirrored on bond markets, where yields rise when prices fall.

Yields on ten-year bonds – a key measure of how much it costs the Government to borrow – dropped to 4.43 then surged to 4.54 within minutes before eventually falling back again.

Mr Khalaf, head of investment analysis at AJ Bell, said the wild swings had been sparked by traders being caught ‘on the hop’ by the leaked OBR data.

He added that ‘The Chancellor was left with a depleted squad of fresh announcements in the Commons. 

‘Then the OBR capped this off by publishing their economic report early. Most likely a fumbled mistake, but you could not make this stuff up,’ he said.

DIY INVESTING PLATFORMS

Easy investing and ready-made portfolios

AJ Bell

Easy investing and ready-made portfolios

AJ Bell

Easy investing and ready-made portfolios

Free fund dealing and investment ideas

Hargreaves Lansdown

Free fund dealing and investment ideas

Hargreaves Lansdown

Free fund dealing and investment ideas

Flat-fee investing from £4.99 per month

interactive investor

Flat-fee investing from £4.99 per month

interactive investor

Flat-fee investing from £4.99 per month

Investing Isa now free on basic plan

Freetrade

Investing Isa now free on basic plan

Freetrade

Investing Isa now free on basic plan

Free share dealing and no account fee

Trading 212

Free share dealing and no account fee

Trading 212

Free share dealing and no account fee

Affiliate links: If you take out a product This is Money may earn a commission. These deals are chosen by our editorial team, as we think they are worth highlighting. This does not affect our editorial independence.

Compare the best investing account for you



#shambolic #Budget #leak #threw #financial #markets #chaos #enabled #City #traders #cash

- Advertisement -

More articles

LEAVE A REPLY

Please enter your comment!
Please enter your name here

- Advertisement -

Latest article

'Black hole lies' leave Reeves fighting for her job in worst crisis so far for Starmer Government

The Prime Minister was rallying to support his Chancellor after she had to deny on live TV that she had misled the public...

Major fast food chain saved in multimillion pound takeover as dozens of branches shut

Byron has been a staple on many British high streets with its specialty burgers, but a new takeover has meant that its seven remaining...

Mike Ashley’s Frasers to post update after grim warning

By EMILY HAWKINS Updated: 16:50 EST, 30 November 2025...

Lucas Paqueta slams FA in extraordinary outburst after red card against Liverpool: ‘Ridiculous’

Both were issued for dissent, with Paqueta furious after a decision made by referee Darren England. He continued to argue angrily with the...

Starmer signals fresh push on welfare reform in bid to move on from Budget row

The Prime Minister will make the case for a welfare system shake-up after the axing of the two-child cap in the Budget was...