Nine investment experts reveal what has them spooked this Halloween: Forget ghosts and ghouls, how about growth and the global economy?

What’s spooking fund managers this Halloween: Many top-down investors have been placing their bets on a shift to fiscal policy and some have even been behaving as though a macro policy change is about to occur. Jeremy Lang, founder and partner at Ardevora Asset Management tells This is Money that making such predictions could be dangerous, as it could infect other decisions, particularly about whether certain stocks look good or bad.