According to your question, the market value fluctuates with the fluctuation of the stock price. This is floating loss and floating profit.

Assuming that the loss of handling fee is deducted, you will lose 0.9 yuan when the next day is 0. 1 yuan, and you will lose 0 yuan on the third day.

But before you sell it, everything is changing, and your final profit and loss depends on the transaction price you finally sell.

Similarly, if you buy a house, whether the house can finally make money depends on the transaction price of the house you finally sell. The rise and fall of the intermediate house price is a floating loss and a floating profit, which will not affect your final profit and loss ~