Berkshire Hathaway is a hedge for a tech-heavy portfolio against a tech correction, an oil shock or an inflation spike. It offers defensive exposure to insurance, energy and rails, a cash pile of over $350 billion that makes it an optionality machine, and a culture of discipline and compounding that should outlast Buffett. Possible bad surprises from the Iran conflict make that protection worth having during inevitable rotations. x.comÂ