According to Berkshire Hathaway's most recent filings, the investment firm has taken a position in a new stock.Warren Buffett has been one of the most closely followed investment personalities on Wall Street for nearly 60 years. With compound annual returns nearly twice as good as the S&P 500 (^GSPC 0.40%), it's no wonder why Buffett has earned the moniker the "Oracle of Omaha."What I find fascinating about Buffett is that when he is asked questions about his strategies or economic outlooks, his answers are ...