what happen when my stock lose it value?

You just lose the value of the stock, but not the actual stock itself. If you bought the stock for $10.00 a share and it goes down to $9.00 a share then you have lost $1.00 times the number of shares in the company you own. This happens all the time and people just hold on to the stock and wait until it goes up again.

If the price of your stock drops, you have lost money on paper. Should you sell the stock when the price is down, you will have locked in the loss. You also have the option of holding on to the stock and hoping that the price comes back up, which would negate the loss.

Someone comes round from the Stock Exchange and checks that you are suffuciently knowledgeable to hold stocks and shares.

Answer No & no. Remember that for when they knock

Numbers go up and down all the time in stocks; you only really lose or make money when you sell the stock.

If you lost money you may declare it in your tax as a loss to offset another stock that made money

If you made money, you may pay tax on the gain and get a thank you letter from the IRS with a box of chocolate.

nothing happens, dont panic,