Net profit loss still need submit self assessment ?

I sold all US stock shares, but the total net profit was loss. Do I still need to submit a self assessment for capital gains ?

Hi Tony,
Only if you want the loss to be recorded so that you can use it against any future gains.
Thank you. 

 

If I sold stock A gained £10, but I sold stock B loss £100. The total net profit of the tax year was -£90. Do I still need to report the capital gain of stock A?

Hi Tony
For those figures no. you may however want to report it in a letter so that the losses are on record should you wish to use them at a later date.
Thank you.