Full position: means that all the money in your stock account has been purchased. Short position: It means that your stock account is full of cash and you have not bought any stocks. Heavy holdings: refers to the stocks purchased in your stock account that account for most of the market value of all your funds. Heavyweight stocks: refer to those stocks whose market value accounts for a large proportion of the total circulating market value of a market relative to its total circulating market value. Its rise and fall have a great impact on the market. For example, PetroChina's stock rose by 1 point, driving the market index to rise by 10.5 points. And the opposite is true for falling.