RE: FT article5 Sep 2021 13:20
I'd say a lot is down to home bias.
In US you have 350 mill all speaking same language and investing is much more common place, and most of that investing will be in US stocks.
In UK the pop is a fifth so that's already a disadvantage, plus as Europe is split by language it's harder to get good info about stocks outside your own nation (how many here do we reckon own any German or Italian stocks for eg?) Plus we don't really invest in this country except in pensions and pension funds want stable returns fro dividend. However that stops company growing as lots of profit is going straight out of the business. Also penalises growth companies as there is much less demand for their shares.
That's my 2 pence, will be interesting to see, esp with new free trading sites, if things change here. Certainly now every employee has to get a pension from their worker will mean more money should flow into stocks, but will it still just be the big div ones?