Options traders are targeting CarMax Inc (NYSE:KMX), after the used-car retailer reported better-than- expected third-quarter earnings of 52 cents per share, more than doubling the 24 cents per share from the same quarter a year ago. Cost cuts helped soften the blow of lower demand amid higher interest rates, as the company offered significant discounts on vehicles. So far today, 16,000 calls and 14,000 puts have been exchanged, which is already 3.5 times KMX's average daily options volume. The weekly 12/22 ...