There is no new catalyst. MTZ rose about 4.5% after investors reassessed MasTec's October 29 results, which included revenue and backlog above expectations but full-year EPS guidance below consensus; the earlier guidance-driven selloff remained the standing cause.
MasTec Q3 results The rebound came against a sharp U.S. equity selloff, while MTZ trading volume stayed unusually high.
U.S. market selloff