UK Election Playbook

by at Pepperstone.
Chris Weston
Chris Weston

On my week ahead video, I look at weekly implied volatility in G10 FX and other heavily traded instruments – where everything, at that time looked calm and collected. Shock, GBP vols have rocketed higher here and I wanted to highlight this to traders, as the market is now saying the UK election this week is a genuine event risk.

Well, we all knew that, but now the options market is crying out that things have just got real and Thursday night (Friday day session in Asia) could be a volatility event.

Timings To Concern Yourself With

In terms of the election itself, polling stations open across Britain on Thursday from 07:00GMT and close at 22:00 GMT (18:00aedt to 09:00aedt Friday), with exit polls expected to be seen shortly after.

We should hear from Sunderland as the first result off the rank and that should be released sometime around 00:00GMT (Friday at 11:00aedt).

The period then between 00:00GMT and 03:00GMT, or what is the late morning trading session in Asia (Friday), could be quite lively for the GBP and to an extent the FTSE 100.

It is expected we know of the result of the election by 03:00GMT (14:00aedt). There are a number of key battlegrounds and marginal seats which will be influential, and the outcomes of these seats could cause sudden and rapid moves in UK assets.

Current Expectations

Firstly, the outcome from tonight’s YouGov MRP poll (due out at 22:00GMT/09:00 AEDT tomorrow) could be quite influential, as this should go some way to cementing/re-assessing expectations around the current Tory majority, where recent polling gives them a 10-percentage point lead.

Most would consider anything over 5-ppt as a big enough cushion to avoid a hung parliament. If we look at the betting sites, these generally have the Conservative party gaining 348 seats, which would be 28 more than the 320 required to get the majority.

On the Betfair exchange, the market is pricing a 59.5% chance of the Tories getting 340 seats (or more), with the next highest probability being 330-339 seats, where we see a 16% probability.

Basic UK Election Playbook

Given polling and betting market expectations, which we can then extrapolate into GBP price action and the recent run of form in the GBP, I have devised a very simplistic playbook for the day. (Please don’t take this as a political view):

  • Conservatives get 340 seats or more – GBP rallies 0.5% to 1% on the idea of a ‘strong’ government, while hung parliament hedges is unwound, although this outcome, in theory, is largely discounted
  • Conservatives get 320-330 seats – GBP falls 0.5% or so, on the idea that Johnson may find it problematic extending the ‘Transition Period’ past the deadline of end-2020, that is, assuming he passes his recent EU deal through the Commons.
  • Hung parliament (Conservative get 319 seats or less) – This outcome really can’t be ruled out and is a material risk for GBP longs. GBP will find strong selling activity here, given the uncertainty in the period ahead, where the number of Tory seats will dictate the sell-off as traders look at the probability of Johnson forming a coalition with the Brexit Party.
  • A Labour victory – Given betting sites give Labour around 225 seats, it would be a huge shock for Corbyn to get a majority and would almost certainly cause a meltdown in the GBP. However, it is not out of the realms of possibility but would need to see a hung parliament first.

Other Trading Considerations

If I look at market positioning, leveraged traders have reduced GBP shorts and are currently running a flat net position, although, if we take the pool of players out, GBP shorts held by non-commercial accounts are still held short to the tune of 30k contracts.

GBPUSD Net Futures

We should consider the anticipated move in GBP through the event and coming 5-days. Here we see GBPUSD 1-week implied volatility (vol) at 17.7%, which if we remove the spike we saw during the Brexit referendum vols are clearly at the top percentile. The options market is pricing a move in GBPUSD.

To quantify this, we can use this implied vol structure and see the market pricing (with a 68.2% level of confidence) a weekly move (up or down) of 298-pips in GBPUSD, or 251-pips by the 13 December expiry. That is clearly a punchy move for some, and therefore if that doesn’t suit your strategy it is a risk that should be looked at. Of course, other traders love higher vol periods.

I can take the expectations and see the market sees with an 80% level of confidence that GBPUSD should be contained within a range of 1.3548 and 1.2639 – although, that would be seen as an extreme move.

Last price High Low

It’s not just GBPUSD, but here we see GBP 1-week implied volatility against other major currencies. GBPJPY is the one the market really sees the potential for fireworks.

Implied volatilities 9thDec

GBPUSD 1-week risk reversals – Risk reversal look at the skew or the difference between Call and Put 1-week implied volatility.

If this number is negative like it is in GBPUSD (at -2.9), then we know put volatility is higher than call volatility, so the demand for downside options is relatively higher than upside.

While we are not seeing this play through in GBPUSD spot, it appears that traders have sensed the risk of a hung parliament and used cheap put options to hedge this risk.

Risk reversals 9Dec

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