Wharton Fingers Co has just made a public announcement that it plans to launch a new product on to the market that should reduce the volatility of its reported annual profits. On the same day Saliva Co, a food products manufacturer, has publicly announced that it has withdrawn substantial inventories of its product from its retail customers because of a reported food poisoning incident.

If neither of these items of information had been made public before, what effect should they now have on the companies' share prices, assuming that the stock market has semi-strong form efficiency?

      Saliva Co share price:Increase

      Saliva Co share price: Decrease

C.    Wharton finers Co share price: Increase

      Saliva Co share price: Decrease  

      Saliva Co share price: Increase