One stock with some huge insider buying is Navistar International ( NAV), which through its subsidiaries manufactures and sells commercial and military trucks, buses, diesel engines, recreational vehicles and chassis, as well as provides service parts for trucks and trailers. This stock is down 6% so far in 2011, so insiders might be finding some value here during the recent market pullback. This company has a current market cap of $3.9 billion and an enterprise value of $7.7 billion. The stock trades at a reasonable trailing price-to-earnings of 17 and a very cheap forward price-to-earnings of 7. This isn't a cash-rich company; its balance sheet has a total debt of $4.91 billion and total cash of only $1.08 billion. A director just bought 56,000 shares, or about $3 million worth of stock, at $53.97 share. This is the second time a director has stepped up and bought Navistar stock during the month of June. From a technical standpoint, this stock has been hit tremendously hard during the past two months, with shares falling from a high of $71.50 to its current price of around $54.50 a share. That slide in the stock took shares below both the 50-day and 200-day moving averages. The stock does have some previous support at around $50 a share, and just recently it bottomed at $52 a share. If you're looking to buy this stock right now, I would use that $52 to $50 area as my stop in case this one wants to go even lower. If it holds those levels, then it might be a good idea to follow the insiders. That said, if it breaks those levels then it could easily head towards the next significant past support price at $46 a share. It's worth noting that the short interest in this stock has been rising recently as the bears succeeded in knocking this name down sharply. The short interest as a percentage of the float for NAV stands at 6.6%. The bears have increased their bets from the last reporting period by 14.5% as of May 31. Navistar, one of the top holdings of David Tepper's Appaloosa Management, was one of Barrington's Best Stock Picks for 2011.