Investors are running away from Apple and towards Google because the former lacks "certainty" while the latter is expected to grow its share of the expanding web-advertising market, resulting in the largest gap in price-to-earnings ratio between the two companies since June 2005. While Apple is still valued more than $100 billion more than Google, the web advertising giant's stock price is considerably higher than Apple's and gaining, whereas AAPL has endured a steady malaise since it hit an all-time high last fall.