in 1993 , when the shanghai securities market developed at its fastest pace , the number of stock listing leaped by 2.2 times , and the total shares on the market surged some 4.5 times , and when it came to companies listed on the market , they went from only two earlier in the year and expanded to 36 , and there was 2.8 fold increase in the number of member securities traders , while in particular , the market 's annual transaction total reached a volume of 500 billion yuan , making up half of the total volume of shanghai market transactions .