Why AT&T Stock Rallied Tuesday Morning

Shares of telecommunications specialist AT&T (T 2.32%) popped on Tuesday, climbing as much as 3.3%. As of 1:30 p.m. ET, the stock was still up 2.6%.The catalyst that sent the telecom stock higher was an upgrade and some positive commentary from a Wall Street analyst.Is AT&T stock going to $21?Wolfe Research analyst Peter Supino upgraded AT&T stock to outperform (buy) from peer perform (hold) while simultaneously boosting his price target to $21. For those playing along at home, that suggests potential upsid ...