AT&T is trading at $21.63, up 12.60% in pre-market; the cause of the September 28 move remains unclear.

  • No fresh company-specific announcement explaining the September 28 move was identified.
  • AT&T’s investor-relations page lists a September 24 dividend declaration; the reported BNP Paribas corporate-bond upgrade dates to September 21, and neither establishes a direct catalyst.
  • Broader markets were under pressure amid rising oil and Treasury yields, a backdrop that does not clearly explain this sharp move higher; no volume information was provided.