Berkshire Hathaway’s $1 billion homebuilding investment indicates Warren Buffett’s confidence in a future U.S. housing market rebound.

Berkshire Hathaway recently initiated a position in UnitedHealth Group stock. Shares of UnitedHealth have plummeted by roughly 40% this year. Despite some turbulence, its business boasts several attributes that Buffett seeks.

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 investments was big enough to ensure that legendary investor Warren Buffett may have handled them.