Markets have largely shrugged off events in Catalonia. They are probably correct to do so.
After all, Catalonia is unlikely to become independent, at least for the foreseeable future. There does not appear to be a majority in the region in favour of independence (although that could change). Constitutionally, Spain is a unitary, indivisible state, so there is currently no legal route to independence. And international opposition to independence, at the margin, makes it more difficult.