Warren Buffett's Berkshire Hathaway sold nearly $390 million worth of Delta and Southwest shares this week

· · *Warren Buffett's Berkshire Hathaway sold nearly $390 million worth of shares in Delta Air Lines and Southwest Airlines this week, new SEC filings show.*
· *The billionaire investor's company cut its stake in Delta by nearly a fifth and its Southwest holdings by just over 4%.*
· *Berkshire's stock portfolio took...