Why is AT&T stock sliding today?

Recent market activity shows a divergent trend among several major companies. AT&T, Domino’s Pizza, and Aevex are all experiencing a slide in their respective stock prices today. In contrast, SK hynix ADR is seeing a positive movement, with its stock rallying. These shifts reflect the current volatility across different sectors, as three of the mentioned entities face downward pressure while the semiconductor-related ADR gains momentum in the trading session according to the provided reports.