The actions of the charges in global, nearby or local markets are captured in fee indices known as stock marketplace indices, of which there are numerous, e.g. the S&P, the FTSE and the Euronext indices. Such indices are typically market capitalization weighted, with the weights reflecting the contribution of the stock to the index. The constituents of the index are reviewed regularly to encompass/exclude shares so one can reflect the converting enterprise environment.n brief promoting, the trader borrows inventory (commonly from his brokerage which holds its customers stocks or its own stocks on account to lend to brief sellers) then sells it in the marketplace, having a bet that the price will fall. The trader ultimately buys back the stock, earning profits if the price fell within the interim and dropping money if it rose. Exiting a brief function with the aid of buying lower back the stock is referred to as "protecting". This strategy can also be used by unscrupulous traders in illiquid or thinly traded markets to artificially lower the price of a inventory. hence maximum markets both prevent brief promoting or place regulations on while and how a brief sale can occur. The exercise of naked shorting is illegal in maximum (however now not all) stock markets.