Select Energy Services is trading 6.65% down at $18.01 in after-hours trading, with the decline appearing mainly tied to stronger economic data and renewed inflation concerns that pushed Treasury yields sharply higher.
- It closed September 23, 2026, at $19.29.
- No confirmed company-specific announcement was identified.
- Major U.S. indexes fell more than 0.5%, reinforcing the global-macro explanation for the decline.