Horton, Lennar and Other Home Builder Stocks Jump. Buffett Bets on the Outlook Improving.

1. Berkshire Hathaway invested in D.R. Horton and Lennar recently. 2. Buffett's investment signals a potential turnaround for home builders. 3. Federal Reserve might lower interest rates, helping the housing market. 4. Home builders surged in pre-market trading on investor optimism. 5. High mortgage rates have hurt demand, but sentiment is improving.