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. Long position is a speculative way in futures trading. Speculators estimate securities, commodities, etc. If the price tends to rise, buy in advance, and then try to sell after the price rises, in order to obtain the difference benefit. This kind of speculation is based on buying first and then selling, and speculators have more securities or commodities to sell, so they are called "bulls". As opposed to a bear.