There are a few generally accepted rules that apply to most Latin abbreviations. The major style manuals (MLA, APA and Chicago) agree that Latin abbreviations should be kept out of the main body of a text-that is, they should not appear in ordinary sentences within ordinary paragraphs.
Efficient-market hypothesis. Efficient-market hypothesis (EMH) is a theory in financial economics that states that an asset's prices fully reflect all available information.
Proponents of the efficient market theory believe that there is perfect information in the stock market. This means that whatever information is available about a stock to one investor is available to all investors (except, of course, insider information, but insider trading is illegal).