I don’t think Brexits impact to the world economy has been priced into stocks at all.
Everyone thought they’d figure it out, but that looks very unlikely at this point.
I don't think anyone knows what would happen when a no-deal Brexit happens.
There have been scenario's and such but a EU member state has never left the block.
The biggest fear with Brexit was that it would act as a catalyst for more members leaving such as Italy.
But the English bungled it to a point that they torpedoed the 'leaving EU' plans in Italy, The Netherlands and elsewhere.