Jefferies analyst Peter Misek has slashed his price target for Apple stock from $500 to $420, below its current trading value. He argues that there's a 25 percent chance Apple will miss its guidance for the current quarter; he also cites supplier checks as indicating that Apple is having problem with new casing colors, pushing an alleged iPhone 5S ship date from June to somewhere between July and September. On top of this, prices for some of the components in Apple's rumored low-end iPhone are thought to be higher than anticipated, including a 4-inch Retina display and the same processor as