This paper shows that the evolution of financial markets implies some features of the postmodernism, as for example, the emergence of a hyperreality or an over-exaggeration of the exchange. Computerization contributed to the development of what Baudrillard called a hyper-reality in which financial quotations are self-referent, i.e. they do not refer to an economic reality. Finance is now in post-modernity and this essay offers an analysis of this financial post-modernity.