risk
Budget For Risk, Not Return
The rule
You cannot guess where the price will go. But you can guess how wild the ride may get. So plan for the shaking, not for a number you cannot know.
Where it flips
If you look only at the shaking, you may run from every rough asset and hide in cash. Then inflation quietly eats your money over the years. The fix is to accept some shaking as the cost of long-term growth. Manage it, do not flee everything that moves.
Mandelbrot said guessing the next price is almost hopeless. But how rough or calm a market is likely to be is much easier to judge. So stop building your plan on a hoped-for return. Build it on how much shaking you can sit through. Ask 'how wild might this get, and can I hold on?' Do not ask 'what number will it reach?'
A worked example
Instead of assuming '15% a year', Aarvi plans for the market to fall 40% in a bad patch. She keeps an emergency fund. She keeps her SIP small enough that a crash won't force her to sell. The return still comes, but her plan never leaned on guessing it. [illustrative]
How to spot it
- ·a plan built on a promised yearly return
- ·no answer to 'what if it falls 40%?'
- ·sure about direction, but silent about risk
Benoit Mandelbrot · The (Mis)behavior of Markets