Buffett's Class A shares (BRK.A) have returned more than 3,600,000% since 1965.
More than half of Berkshire Hathaway's investment assets are in just two stocks.
Wall Street and investors should monitor Buffett's purchases, sales, and holdings.
Warren Buffett loves dividend stocks and cyclical firms, but his portfolio concentration is most noteworthy.
Berkshire Hathaway acquired New England Asset Management (NEAM) in 1998 when it bought General Re.
Apple is a growth engine and/or valuation determinant for Berkshire Hathaway's shares and book value, according to Buffett.
Apple's innovations go beyond hardware. Tim Cook's multiyear move emphasizes subscription services.
As subscription services make up a higher portion of total revenues, revenue volatility should decrease.
Apple has repurchased $520 billion in shares since 2013 and pays one of the world's highest dividends.
Buffett owns Bank of America (BAC -2.26%). Berkshire Hathaway owns 12.9% of New England Asset Management's 1.03 billion shares.