NEW YORK ( TheStreet) -- Warren Buffett has released what is regarded as the most widely anticipated missive within the financial realm. The Berkshire Hathaway ( BRK.A) shareholder letter provides investors and non-investors alike with insight into Buffett's investment holding empire, as well as a clearer window into minds of both the Oracle and his partner, Charlie Munger . Without any self-penned autobiography of his own, some view this yearly document as the best and most thorough account of Buffett's business and personal life from the investor's own perspective. >>Warren Buffett can't be everywhere, or can he? In this letter, Buffett outlined the structure of Berkshire Hathaway and provided a forecast for the firm heading into the future. Additionally, Buffett gave his own take on a number of hot topics including the U.S. economy, which he is confident is on the mend; the U.S. financial system bailouts, which earned Buffett billions with Goldman Sachs ( GS); the investor's all-in purchase of Burlington Northern Santa Fe ( BNI); and his feelings regarding stock-fueled mergers and acquisitions, such as the Kraft ( KFT)- Cadbury ( CBY) deal, which Buffett adamantly disapproves. One of more interesting themes of Buffett's letter was his focus on Berkshire Hathaway's investing strategy. Recently, a hotly debated issue among Buffett watchers has been whether or not the investor's strategy has gone through a transformation. In the past, Buffett has risen to fame for his ability to find and scoop up undervalued companies with plenty of upside potential. In the past 18 months, this technique earned him impressive profits when he bet billions on Goldman Sachs as it was on the brink of collapse and when he purchased a large chunk of BYD, the Chinese small battery and electric car firm. While these two plays were typical of Buffett's traditional style of investing, a growing number of the investor's recent purchases have shown him to be focused more on stable, conservative growth rather than on staggering upside potential. Most notable was his railroad purchase, which Buffett has insisted on numerous occasions will not see any massive jumps under Berkshire ownership, but rather provide investors with strong, consistent returns for 100 years or longer.