AT&T (T) has faced challenges in the past. Its stock fell by over 30% in a period of less than two months on two occasions throughout various years, erasing billions in market value and negating significant gains in a single correction. If historical patterns hold, AT&T (T) stock remains susceptible to unexpected, rapid declines.Sign with logo on facade of AT&T retail store, Walnut Creek, California, August 25, 2025. (Photo by Smith Collection/Gado/Getty Images)Gado via Getty ImagesThe Risk That Is Evolving ...