All shares might start getting walked down to price in the risk of a No Deal Brexit. In normal times, a No Deal would not happen, however, these are not normal times.
Monday - Market experiences small bounce. Tuesday - Buying frenzy. Wednesday - Big Shorts (financial). Thursday - Craig is on the 10 O'clock news. Friday - KAZ share double in value. GLEN shares don't after the board is found to have bought an island in the pacific from Blofeld. Leading to another DoJ investigation.