Trading in Hilton Hotels Corp.’s stock and call options jumped wildly right before the announcement after the close of trading on July 3 that Blackstone Group would take the company private at $47.50 per share.  The stock price had been hovering in the low thirties, although on July 3 the shares jumped over $2 per share to $36, still more than $10 from the offer price.  According to a Bloomberg story (here), trading in Hilton Hotels call options was up over nine times the average volume before the announcement, and a number of trades were in out-of-the-money contracts, indicating that — here’s a shocker — someone had a pretty strong inkling something was about to happen to the stock.  Another deal, another SEC insider trading investigation, in all likelihood.  We’ll see if anything comes of it. (ph)