Market efficiency is a hypothesis which was formulated by Eugene Fama in 1970. This hypothesis consists of three market form of efficiency such as strong, semi and weak form of market efficiency. According to the EMH, as prices respond only to information available in the market, and because all market participants are privy to the same information, no one will have the ability to out-profit anyone else. In other words, investors are not able to earn abnormal profits though the fundamental and technical analysis.
In efficient markets, prices become not predictable but random, so no investment pattern can be discerned. A planned approach to investment, is cannot be successful in a strong form of efficient market. This random walk of prices, commonly spoken about in the EMH school of thought, results in the failure of any investment strategy that aims to beat the market consistently.
Volkswagen emission scandal
Let's discuss the current popular issue with the efficiency market hypothesis!
The emission scandal of Volkswagen was unfold in the early of September and this causes a big chaos to the company. This scandal caused a significant financial impact to the company in order for them to win back the trust of customer and the sizable amount of fine from Environmental Protection Agency (EPA).
The scandal has caused the shares price of vw to fall tremendously of 35.65%
Short fall of shares price for vw could be the indication of the semi-strong or strong form in efficiency market hypothesis? In my opinion, the majority of investors generally able to access with information speedy. Can we get to earn the abnormal profit in this semi-strong form of efficiency market beside of the legal insider trading?