We investigate the impact of heightened political uncertainty in the run‐up to, and after, the 2014 Scottish independence referendum. The conditional volatilities of stock returns of our Scottish index and the FTSE all share index are characterised by the same GARCH parameters for a sample ending in late 2013, but this no longer holds when estimation extends closer to the referendum. The relative volatility of Scottish companies’ stock returns peaked when polls indicated the referendum result was ‘too close to call,’ fell back on the result, but rose again in the run‐up to publication of proposals for further devolution.
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Darby et al. (2018) studied this question.