KEY POINTS
  • The 87-year-old Berkshire Hathaway chairman increased his Apple stake, Jim Cramer says.
  • "[So], he obviously does not care about the so-called supercycle of the [iPhone] X not working well," the "Mad Money" host says.

Billionaire investor Warren Buffett obviously isn't concerned about Apple's slow iPhone X sales, CNBC's Jim Cramer said Thursday.

Berkshire Hathaway, which Buffett is the chairman of, has increased its Apple stake, "[So], he obviously does not care about the so-called supercycle of the [iPhone] X not working well," said Cramer, whose charitable trust owns shares of the tech giant.