MasTec is trading 4.0% down at $197.88 as hotter-than-expected inflation and rising Treasury yields weighed on U.S. stocks. - On October 14, 2026, annual headline CPI was 3.7%, above the 3.6% forecast; core CPI was 2.6%, versus a 2.5% forecast. - Renewed expectations of Fed rate hikes added pressure. No new company-specific catalyst explaining the intraday decline surfaced in available reporting; Reuters said U.S. stocks were headed lower as yields rose after the CPI release.