Buffett stepping down as Berkshire chairman, effective immediately per CNBC.

End of an era. The Oracle of Omaha built one of history's great investment vehicles over six decades. $BRK.B will now navigate without its founding architect at the helm.

This changes the conversation around succession, capital allocation, and whether Berkshire's conglomerate model survives intact. Markets will be watching how Greg Abel handles the transition and whether the culture Buffett built can outlast him.

Big moment for American capitalism.