Warren Buffett's Giant Berkshire Portfolio: Top 10 Includes Banks, Oil, And Apple

1. Warren Buffett is stepping down as Berkshire Hathaway CEO this year. 2. Apple is the largest holding in Berkshire's portfolio at $60.1 billion. 3. Apple's year-to-date performance is down 18.2%, contrasting with other holdings. 4. Buffett's departure may influence Berkshire's investment strategy, impacting Apple. 5. Only two top holdings in Berkshire are positive this year.