This article sort of "tries to boil the ocean" by touching on everything from neg rates, illiquid markets, passive investing, etc. Whether or not you agree with it, the perspective is interesting.
Some points from the article:
* a negative yielding bond is not a bond, its a liability... 30% of global gov bonds now have neg yields if bought at current prices.
* "Zero and negative rates have accelerated the rise of passive strategies and ETFs. As an equity investor, looking at an environment of negative rates globally and knowing something is wrong, I should step to the side, prudently. This should curb equity excesses, and meanwhile keep the S&P below 2000. But such informed investor is no longer there: it is a renowned fact that between 70% and 90% flows daily (depending on the source being BAML, MS or Vanguard) on the S&P are passive. Passive vehicles have no need to overanalyse assets before buying."
* "portfolio management tools like Capital Asset Pricing Model (CAPM), Modern Portfolio Theory (MPT), Value At Risk (VAR), Risk Parity are all ill-equipped to handle a world of lasting negative interest rates."
* "Bonds as an asset class are in an existential crisis. But, if bonds are not bonds, it also means that a lot of ‘balanced portfolios’ out there – incidentally representing the bulk of asset allocation globally – are no longer ‘balanced portfolios’, but rather ‘long-only equity portfolios’, with some ‘cash’ to the side. Except the ‘cash’ is fake-cash, insofar as it can lose money too, and is likely to do so at some point down the road upon resurgence of inflation, default risk or confidence crisis."
https://www.zerohedge.com/news/2019...-fake-markets-imminent-daily-liquidity-crisis