Forecasting stock prices using trends of past data should not be an effective method for making trading decisions if asset markets are

Question

Quizplus · Accepted Answer

In efficient markets, all available information is already reflected in stock prices. In weakly efficient markets, all past trading information is reflected; in semi-strongly efficient markets, all publicly available information is reflected; and in strongly efficient markets, all information, including insider information, is reflected. Therefore, using past trends for forecasting in any of these scenarios should not be effective for making trading decisions.

Forecasting Stock Prices Using Trends of Past Data Should Not