According to incomplete statistics, automated transactions account for more than 70% in foreign markets, and have increased from 5% of 20 1 1 to 20%-30% in domestic markets. China still has a lot of room for development, which is expected to reach 50% or even 70%. Since the abolition of the 80A rule in new york Stock Exchange in 2007, the average trading volume of automated trading days in NYSE market has reached 1000 billion shares. Goldman Sachs, Morgan Stanley and Deutsche Bank are all active participants in automated trading. In July 2007, Citigroup, which had already developed its own automated trading, invested 680 million dollars to acquire an automated trading platform from a company that traded about 200 million shares every day (accounting for 6% of the trading volume in the US market).