Suddenly the penguins knives are out for the world’s biggest company, and exactly one week after Pacific Crest downgraded Apple to “Sector Weight” and a $145PT, perhaps a harbinger of what was to come later in the week, overnight another bank, Japan’s Mizuho, has also taken the machete to its own growth forecasts to Tim Cook’s juggernaut, and downgraded the iPhone maker to neutral from buy, cutting the price target from $160 to $150, saying the best case