Get our introductory offer at only
*$0.99/month for first 3 months
$29.90/month for the next 9 months
WARREN Buffett's Berkshire Hathaway Inc was an aggressive buyer of stocks in last year's fourth quarter, nearly quadrupling its stake in Apple Inc and increasing its stake sevenfold in the four biggest US airlines.
In a regulatory filing, Berkshire reported owning 57.4...