"We have been surprised and disappointed by the sharp decline in our share price over the past 90 days," said Chairman Thomas Edelman. "The entire ethanol sector has traded down during the period, primarily in response to lower ethanol prices and the steady flow of news reports about a short term excess of ethanol production capacity. Regardless, we believe BioFuel's share price has become significantly undervalued. Accordingly, we believe repurchasing shares at these prices represents an exceptional investment opportunity and are electing to utilize a portion of our capital in this way." Mr.Edelman along with the smartest investors in the investment business are betting on the recovery of the ethanol market and, more specifically, BioFuel. These are investors who hate to lose and rarely ever do. You now have a chance to buy shares at prices 50% below what David Einhorn's Greenlight Capital and Dan Loeb's Third Point paid. These two are friends and I know they will do whatever it takes to make this company a resounding success.

But, let's get to why Barnes & Noble made the cut into today's 'Insider Purchases and Share Buyback Portfolio.' Leonard Riggio, the company's chairman, continues to buy his company's shares. He disclosed on Friday evening a purchase of 300,000 shares at $38.02, bringing his stake to 13,364,597 shares, or more than 20% of company's total outstanding shares. Only a month prior to that purchase, on 9/11, he bought 100,000 shares at $32.95 apiece. And almost exactly one month earlier, on 8/10, he purchased another 100,000 shares at $32.64 a share.

In an amended 13F, Warren Buffett's Berkshire Hathaway disclosed it sold close to 3 million shares in Norfolk Southern Corp. and a 7,411,200 share stake in Union Pacific Corp. (NYSE: UNP). Buffett's Berkshire Hathaway held 6,362,800 shares of Norfolk Southern and 10,513,100 shares of Union Pacific shares at the quarter ended March 31, 2007. Lately, Buffett has been raising his stake in Burlington Northern Santa Fe.

In an amended 13F, Warren Buffett's Berkshire Hathaway disclosed it sold over 3 million shares of Union Pacific Corp. Lately, Buffett has been raising his stake in Burlington Northern Santa Fe reports StreetInsider.com