S/F/50. In the efficient market undervalued and overvalued shares do not exist, and therefore it is not possible to develop trading rules, which will beat the market by, say, buying identifiable under priced shares. If a share is traded on the stock market which is priced efficient this means that all investors know what a share is really worth. Discuss

The paper discuss the notion that in the efficient market undervalued and overvalued shares do not exist, and therefore it is not possible to develop trading rules, which will beat the market by, say, buying identifiable under priced shares. If a share is traded on the stock market which is priced efficient this means that all investors know what a share is really worth. In response this piece considers the meaning of stock market efficiency and identifies three forms of efficiency supported by evidence to support their existence including a wide array of expert opinion and theory and continues to asses the implications of such markets for Companies finishing with a well balanced conclusion.