The impact of central bank activity on stock and bond markets is so pervasive that 'don't fight the Fed' has become a cliché. In fact, clichés are thriving in the coronavirus pandemic. We hear 'the cure is worse than the disease', events are 'unprecedented' and 'black swans', hotels and ships are 'Petri dishes', while 'we're all in this together' but it's 'the worst since the Great Depression' before we 'come out on the other side'. And yes, yes, yes, we know 'when the tide goes out, we can see who's been swimming naked'.