Ah, you see, because the market is famously perfectly efficient, equity and bond markets have already priced in the expected effect of Brexit-Trump. So investing in equities now essentially gets you a discount over what they would have cost had Brexit-Trump not happened.

Whereas (more seriously) investing in "more stable" things like bonds forces you to pay a premium, because every man and his dog has desperately been chasing stability, safety, yield, etc since 2008, in many cases using quantitatively eased money to do so.