Listed in just three days later, the stock has jumped 2000%, on December 18, only half a day, that day rose more than 400%, volume of more than 5 million shares, accounting for half of the total outstanding shares, by two days in a row, its market value has reached $5 billion, due to the large period of time to rise too fast, Long Fin trigger circuit breakers exchanges for many times. In the early 20th century, famous American economist elvin fisher developed the theory of economic gain. In its book "the nature of capital and yield", first, the concept of yield is analyzed in terms of the performance of earnings, and three different types of benefits are proposed: Frances O’Grady, the TUC general secretary, said: “Two people working next to each other, doing the same job, should get the same pay rates. But too often agency workers are treated like second-class citizens. So why is yu 'e bao falling steadily? The essence of economic value is human labor in the process of human economic products and relations. The value of the use value of creating products and the labor value of creating production relationship. The value concept in "das kapital" refers to exchange value, which is the essence of capital relations. Can't be replaced by local value The petrol is overfilled