https://www.vanguardinvestor.co.uk/inve ... _fund_link
The relevant numbers are:
- 5 year NAV growth 12.30%
5 year index growth 12.79%
112.30% / 112.79% = 0.9956556
0.9956556 ^ (1/5) = 0.9991296
The annualised tracking error was about 0.1%. This is less than I expected. The OCF is currently 0.15%, and may have been higher in the past. The transaction costs are shown as 0.08%:
https://www.vanguardinvestor.co.uk/cont ... s-2018.pdf
There may also have been some defaults.