LONG-ODDS BET OR A PORTFOLIO OF SCENARIOS?
An intelligent investor – as distinct from a gambler – doesn’t put all his or her money on a single counter. He doesn’t stake everything on a single stock, a single sector, a single asset class, a single country or a single currency. The case for portfolio diversification rests on the existence of a multiplicity of possible outcomes, of plausible scenarios which differ from the investor’s ‘central-case’ assumption.
This isn’t a discussion of market theory, even though that’s a fascinating area, and hasn’t lost its relevance, even at a time when markets have become, to a large extent, adjuncts of monetary policy expectation. The concept of ‘value’ hasn’t been lost, merely temporarily mislaid.
Rather, it’s a reflection on the need to prepare for more than one possible outcome. Sayings to this effect run through history, attaining almost the stature of proverbs. “Hope for the best, prepare for the worst” is one example. Others include “strive for peace, but be prepared for war”, and “provide for a rainy day”. There’s a body of thought which has always favoured supplementing hope with preparation.
Dictionaries might not accept the term “mono-scenarial”, but it describes where we are, working to a single scenario, with scant preparedness for any alternative outcome. The orthodox line is that the economy will carry on growing in perpetuity. Obvious problems, such as the deteriorating economics of fossil fuels and the worsening threat to the environment, will be overcome using renewable energy and the alchemy of “technology”, with “stimulus” deployed to smooth out any economic pains of transition.
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