RE: Lack of buyback y main gripe (as a Pets bull)29 Jan 2025 16:29
If you bought 10 Shares at £1, your avg cost is £1, you 5 of those shares for £2, you realise a gain on those 5 shares of £1 each, so £5.
The shares drop to £ and you use your £10 to buy £10. You average cost is still £1 (5 shares at £1 + 10 shares are £1 = 15 shares for £15 = £1 avg cost). You can't fictionally create a negative cost, you have realised gains and unrealised gains. you can't throw one into the other. The tax man would crucify you for that way of accounting. As you pushing realised gains (taxable) into unrealised gains (non taxable - for now!)
I'm not saying to not add and trim, I'm saying the way you are accounting for them is incorrect.