One other thought to the BOJ outperform case:
1. We know BOJ and JPY Govt Abe/ Aso have had many meetings post-brexit and as it follows the JPY Govt have annonced that they will deliver a fisc stim package of 28bn - which was to the very right of the curve (10-30 was talked about).
- This in mind, imo it is rational to extrapolate that 1) surely if the JPY govt are choosing a tail end stimulus package (aggressive), BOJ will be inclined to do also? Given that it is the BOJ remit for economic targets like inflation, not the governments - BOJ wouldnt want to be seen as dropping the egg would they e.g. govt does as much as it can but BOJ only midly eases - doesnt make sense? Especially given the relationship between kuroda/ aso/ abe it would almost be impossible.
- 2) The BOJ will know/ see that the JPY Govt are taking the "extreme" side of measures, so once again this puts the BOJ under-pressure to do the same as they dont want to be seen as "letting the side down" especially as it is the BOJ who really has the power to change things - the Fiscal package is rather an indicative/ nice gesture of the govts willingness to help - rather than any real hard easing when you consider the Govt package is likely to be 28trn a year but the BOJ purchases/ injects 80trn A MONTH to its monetary based in JGBs - thats 960trn a year. So 27trn govt vs 960trn BOJ - is the govt really making an impact or are they instead signalling their commitment/ putting pressure on the BOJ? I think so.