# Weak Form EMH

Question enclosed!

Lets assume we consider data on a groups of companies of similar investment risk. It was stated in class that under the weak form of EMH, the movement of price of a stock i is a random walk: where is the same for all stocks in the group and is independent of, and cannot be predicted by, past prices.

Consider the following equation: where is the same across the group and and is independent of past prices. Which equation you think reflects the Weak Form EMH better? Explain briefly.

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#### Solution Preview

Hi, See the solution in attached file. Hope this will help. Thanks.

Lets assume we consider data on a groups of companies of similar investment risk. It was stated in class that under the weak form of EMH, the movement of price of a stock i is a random walk: where is the same for all stocks in the group and is independent of, and cannot be predicted by, past prices.

Consider the following equation: where is ...

#### Solution Summary

Weak Form EMH is discussed. The investment risks for companies are discussed.