1. what's the use of the increase? Why is he sometimes green and sometimes red? What's the use for stocks?

Answer: Grasp the range of price rise and fall, with red representing rise and green representing fall.

The formula is: (current price-yesterday's closing) ÷ yesterday's closing.

2. The difference between current price, yesterday's closing and opening. If I buy a stock, do I buy it at the current price or at the price I received yesterday?

a: the current price is the latest price, yesterday's closing price is yesterday's closing price, and the opening price is today's opening price. You buy stocks at the latest price and current price.

3. How long is the stock trading time? If I buy shares today, can I sell them in the afternoon?

the trading time is four hours, 9.3 ~ 11.3 am and 1. ~ 3. noon

a: the stock is a T+1 trading, and you can only buy it today and sell it the next trading day.

4. I bought 1, shares for 1 share in 4 yuan. Now it's 4.25 yuan a share. So how much did I give, and all the stamp duty and handling fees were gone? How much did I give? I hope there's a formula.

A: Generally, the transaction commission is .1%-.3% (there are few online transactions, so the business department can bargain), and the stamp duty is .3% (funds and warrants are tax-free). For every thousand shares in Shanghai, the 1 yuan transfer fee is required, and less than one thousand shares are counted as thousands, and the minimum commission is 5 yuan.

regardless of the minimum commission and transfer fees, the commission is calculated at .3%, and the formula is as follows:

(selling price × number of shares) ×(1- commission-tax) ×(1+ commission+tax) = 4.25× 1× (1-.3%-.

A: Market earnings = market price ÷ profit.

If the stock price is now in 1 yuan, the profit is in .5 yuan, and the market earnings is 1÷.5=2 (times)

Loss-making stocks are the stocks that listed companies lose money without profit.

6. What does the contribution mean ~ ~ What's the use with the stock market?

A: I answered the question for you, which means contribution. The degree to which you understand the question is contribution. The more you understand, the more money you earn in the stock market. This is the role of contribution to the stock market. (Just kidding)