AT&T announced earlier today it is spinning off its media properties in WarnerMedia in a merger with Discovery in a $43 billion deal.Scott Rostan, founder and CEO at Training The Street, joined Cheddar to talk about what the unwinding of the telecom giant's Time Warner media properties means for investors. "I think the investor sentiment is they're digesting the new information, and they're looking into the dividend, especially the reduction of the dividend," said Rostan, noting the transaction allows AT&T to focus on its core telecommunications business.