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Brexit Stress Index: Trade, wealth, business cycle and profit impact

Assessing Brexit’s effect on the UK economy

THE REAL ECONOMY  | 

The prospect of Britain’s departure from the European Union has created uncertainty in the economy and volatility in financial markets. Disruptions to the UK supply chain—a system built over decades within a European common market—will ultimately create losses for consumers through higher prices and diminished consumption choices.

RSM has developed the RSM Brexit Stress Index to measure Brexit’s impact on UK economy. The index is composed of six financial variables whose weekly performance indicates the market’s assessment of Brexit on trade, wealth, the business cycle and corporate profits. The RSM Brexit Stress Index tightened for the week ended March 8 to 0.7 standard deviations above neutral from 0.5 above neutral the week prior; however, it is important to note that the index has declined from over 2 standard deviations above neutral in December, mostly due to financial markets pricing in a reduced probability of a hard exit from the European Union. This implies that economic and financial risks around the policy choices to be made over the next few weeks have eased.


A brief history shows the index moved higher in the run-up to the 2016 Brexit referendum, moved lower in the long period of negotiations and preparations thereafter, and then spiked higher as consequences of an exit from the common market became real.

Index variables

The following variables make up the RSM Brexit Stress Index:

Expectations for foreign trade (via the currency market)

  • British pound/euro exchange rate
  • Volatility of the British pound/euro exchange rate

Expectations of wealth

  • Equity market performance
  • Equity market volatility

Expectations for the business cycle

  • Yield curve spread

Expectations of corporate profitability

  • Corporate yield spread

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