MasTec shares fall 6.68% after-hours following slashed full-year guidance and delayed contracts.

MasTec (MTZ) declined 6.68% in after-hours trading, driven by a recent earnings report that slashed full-year guidance and highlighted delayed contracts. On August 4, the company announced reduced earnings and sales projections amid project delays and operational challenges, sparking immediate market concern. This move followed a broader industry trend of infrastructure firms facing execution risks, with Zacks analysts noting MTZ’s -7.09% decline as a reflection of weakened growth expectations. While Simply Wall St. highlighted a potential undervaluation gap, the short-term selloff underscored investor skepticism about margin resilience amid project execution risks. The after-hours drop aligned with broader sentiment from earnings-related headlines, which emphasized stalled contracts and revised forecasts as key bearish catalysts.