Sounds like you’re doing pretty well looking after your own finances.
Text book answer would say to ensure you have 3-6 months expenses covered in a cash account (that can include bank term deposits or premium bonds etc), with the rest, increase your funding into your existing investment account. If it’s more than your remaining ISA allowance then set it up into a non-ISA account (something like a unit-trust feeder account that automatically tops up your ISA each year - the investment stays the same, the ISA tax wrapper simply covers more with each passing year).
If you’re worried about under diversifying by putting it into the same funds then there are a million ETF’s that track indexes and/or a mixture of equities and fixed interest.
As you’re currently a little way off retirement and cover your expenses quite easily, I’d say that going in on the S&P500 in an ETF wouldn’t be a bad shout to help diversify away from your existing portfolio - assuming you’re not in it already.
Number of factors for that:
- It’s very low cost and will automatically rebalance.
- It’s nicely diversified across a number of industries (tech, pharma, energy etc)
- It’s experienced a fairly bad past 12 months - which is good as the average S&P500 bear market lasts 13 months and the average bull market that follows lasts 4 years and sees 167% growth.
- You won’t have to pay any adviser to look after it for you.
- It’s averaged 11% net per year over the last 30 years - which takes into account the dot com bubble bursting as well as covid and the credit crunch.
- You’re not relying on the Tories not continuing to fuck up the U.K. economy.
- It looks like the US is past peak inflation and whilst they may still stall a bit in terms of the economy, the market prices that in 6-12 months ahead of time which also means the market can and will continue to grow before any recession ends.
- I personally think the US stock market has already seen its bottom and whilst it will continue to show increased volatility over the next 12-36 months, I believe we will see positive growth during that time.
NB: obviously the above is incredibly generic advice and can’t be taken as individual financial advice, I don’t know you personally and haven’t undertaken a full factfind nor have I undertaken a steps necessary to ascertain your capacity and appetite for risk - a wholly equity based ETF isn’t for everyone.
I personally moved a large amount of my portfolio - the part that I “play” with and that’s not actively managed by professionals - into the S&P500 about two weeks ago and I intend to keep it there for at least the next 5 years.
If you’re looking for something more balanced that has a 60:40 equity/fixed interest split then Vanguard 60:40 Life Strategy is one of the best multi-asset funds around for a balanced investor.