In just two trading days, the probability that the sterling will fall to parity against the US dollar increased to 60% on Sept. 26 from 32% on Sept. 23 after the UK government's announcement of new tax cuts elevated concerns for the country's economy. 

Bloomberg estimates that the GBP/USD will have equal value before the end of 2022, based on sterling-dollar implied volatility. The value of the sterling was $1.0350 as of Sept. 26, marking a record low for the currency. 

Economists believe that the slump in the pound could force UK's central bank to enact another interest rate increase in order to support the currency, The Guardian reported. Capital Economics UK Economist Paul Dales told the paper that the Bank of England could raise interest by 100 basis points or 150 basis points. 

The weakness in the pound is being exacerbated by fears the UK economy is entering a recession after inflation breached the 10% mark in July, marking a record-high for the country. It elicited a promise from the Bank of England that it will "respond forcefully, as necessary" to curb the growth in the prices of goods and services. 

GBP/USD 4H, with Implied Volatility Indicator  

The path to parity 

The downward movement of the sterling follows the UK government's announcement of new tax cuts, fueling the concerns of investors and economists that the four-nation country's debt will reach unaffordable levels and further fuel inflation. It also comes after the Bank of England increased rates by 50 basis points, lower compared with the 75 basis-point hike of the US Federal Reserve. 

The government intends to finance its tax cuts with debt worth tens of billions in sterling. The UK Debt Management Office is planning to raise an additional 72 billion pounds before next April, raising the financing remit in 2022-2023 to 234 billion pounds. 

Deutsche Bank UK Economist Sanjay Raja said the tax cuts were adding to medium-term inflationary pressures and were "raising the risk of a near-term balance of payment crisis." 

"Sterling is in the firing line as traders are turning their backs on all things British," said David Madden, a market analyst at Equiti Capital. "There is a creeping feeling the extra government borrowing that is in the pipeline will severely weigh on the UK economy." 

If it comes to pass, what then? 

The implications of the sterling being at parity with the US dollar boil down to how and where the money is being spent. When the euro was at parity with the dollar, there were winners and losers and the same could be expected if ever the sterling is at the same value as the dollar. 

For trading and exporters, the change in the exchange rate will surely be noticeable. In the US, a stronger dollar would mean lower prices on imported goods, which could help cool down inflation. The opposite could be anticipated for the UK as previous payments would afford lesser products if the two currencies are at parity. 

Accordingly, US companies doing business in the UK will see revenue from those businesses shrink if they bring back earnings in pounds to the US. However, if pound earnings are used in the UK, the exchange rate becomes less of an issue.