Long position means that investors are optimistic about the stock market and expect the stock price to be bullish, so they buy the stock at a low price and sell it when the stock rises to a certain price to obtain the difference income.

Short position: Although the stock price is relatively high at present, investors are not optimistic about the stock market prospect and expect the stock price to fall, so they sell the stock at a relatively high price and buy it when the stock falls to a certain price to obtain the difference income.

Long position and short position are trading terms in stock trading. Stock is a kind of securities, and it is a stock certificate issued by a joint-stock company to investors when raising capital, representing the ownership of its holders (namely shareholders) to the joint-stock company. Buying stocks is also part of the company's business, and it can grow and develop with the company.