Every so often, rumors pop up that Mexican billionaire Carlos Slim is going to buy The New York Times Co., in which he already owns nearly a 7% stake. And then those rumors quickly get stamped down by Slim, but not before making some waves in the stock market. It just happened again today, and Times Co. shares rose as much as 8% as a result, according to Bloomberg: "Almost 6,400 calls to buy the stock changed hands, 35 times the four-week average and five times the number of puts to sell... ...The publisher’s stock rose 26 cents, or 3.4...