For each of the following parts, write down the strongest market efficiency concept that you cant rule out with the given information.

a) Suppose you find a data source online that helps you predict the next days return for a particular stock.

b) A family member of a HighGene Pharmaceuticals executive strangely sells all of her shares at the market price in day 1. Without the existence of any news (including the sale) that can affect the stock price in between, the stock trades at a similar price until day 10 when the news arrives that the companys only product was not approved by the FDA. The stock price drops to 0 as the information is revealed to investors.

c) The High Octane Companys production plant was destroyed in a fire on June 22nd. The Companys press consultant appears on TV on June 23 stating the exact amount of loss, and adds that the company had no insurance coverage