AT&T Stock fell by 9.60% to trade at $31.16 by 09:30 (13:30 GMT) on Monday on the NYSE exchange.
The volume of AT&T shares traded since the start of the session was 301.49K. AT&T has traded in a range of $31.00 to $31.16 on the day.
The stock has traded at $37.2500 at its highest and $31.0600 at its lowest during the past seven days.

