The strong efficient market hypothesis states that individuals can not beat the market even if using inside information. (politics.stackexchange.com)
Proponents of efficient market hypothesis say that any new information relevant to a company's value is quickly priced by the market through the process of arbitrage. (investopedia.com)
Whoa, this was a pretty deep and thorough blog post on Efficient Market Hypothesis. (thedigeratilife.com)