Key Takeaways Buffett has long been a big proponent of the index funds that Bogle helped bring to the masses.However, his public declaration that Bogle is an American hero may have also been influenced by the fact that one of Bogle's funds just helped Buffett win a $1 million bet.

Berkshire Hathaway revealed four new investments Thursday in steelmaker Nucor, insurer UnitedHealth and two of the nation’s biggest homebuilders — Lennar and DR Horton — but only one of the investment

Warren Buffett’s Berkshire Hathaway Inc. took new positions in UnitedHealthcare Group Inc. and homebuilder D. R. Horton Inc., and went deeper into other homebuilding and home-related companies, according to a filing late Thursday.