GBP Swaptions Stir From Slumber as Brexit Risks Mount: Analysis
(Bloomberg) -- Sterling long-expiry rate volatility is waking up to Brexit risks as polls skew toward a “leave” vote, although it still remains below past year’s highs, Bloomberg strategist Tanvir Sandhu writes.
- U.K. 1y10y and 1y2y swaptions have been late to react to one of the year’s biggest political risks, which has driven near-term pound volatility to record highs, amid ongoing global yield compression; see swaption vols spreadsheet here
- Short-expiry vols have risen much more though, with 3m10y climbing to 11-month high of 91bp/annual
- Term structure of 10y tenor GBP swaption volatility has now turned negative for 2m expiry vs 1y while it is at zero for 3m vs 1y (see chart here), sluggishly attempting to narrow the gap with deeply inverted FX counterparts
- GBP 1y10y implied vol vs USD has now hit the highest level since at least 2011
- However, the absolute GBP rate vol still remains below YTD high of 92bp/annual
- Further increase in Brexit pricing can cause GBP 1y10y ATMF straddles to break out to the upside
- Among U.K. rate markets, swaptions may see the biggest impact of a Brexit with the implications for GBP rates much less certain amid opposing forces acting on the yield curve
- NOTE: See earlier analysis here: GBP Rate Options Underpricing Brexit Compared With FX
- NOTE: From May 11, if swaption trends seen before 2014’s Scottish independence referendum are any guide, rates markets could follow FX options to turn the volatility spread negative as early as in a month
- NOTE: Tanvir Sandhu is an interest-rate and derivatives strategist who writes for First Word. The observations he makes are his own and are not intended as investment advice.
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