The Perfect ISA portfolio – still winning?

9 min Read Published: 29 Mar 2018

Long-term 80-20 Investor members may recall my previous quest for the Perfect ISA portfolio. Three years ago I carried out a piece of research with the aim of trying to work out what the Perfect ISA portfolio is (or whether one even existed). The Perfect ISA portfolio had to adhere to the following rules:

  • There would be no constraint over which assets could be included or in what proportions they are held
  • The portfolio must have made money every tax year since the last market peak back in 2000
  • and not lost money
  • It had to at least beat a FTSE 100 Index tracker and
  • The asset allocation had to remain constant throughout that time

So, in essence, I wanted to find the perfect 'buy and forget' asset allocation. One which would have achieved the above irrespective of the actual funds you'd bought.

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