It was déjà vu all over again on Wall Street with Dell Inc. (DELL) surging 7.16% and Apple Inc. (AAPL) imploding 3.15%. Thus on both Monday and Tuesday the stocks were respectively the best and worst on the entire S&P 500 Index (^GSPC). It’s unlikely the mortal enemies will ever send each other one of Taylor Swift’s American Greetings (AM) cards which may be why it tumbled 2.13%. (Ms. Swift always could boost business by sending a note of apology to Adele who she seriously side-eyed at the Golden Globes.)   Armstrong World Industries (AWI) slid 1.69% after an analyst said "Sell"; send some stock options to liar ...