Aehr Test Systems is trading 4.3% down at $66.22 on October 16, 2026, amid continued pressure across semiconductor stocks; no clear company-specific announcement explains the decline. - Investors are questioning whether heavy AI infrastructure spending can pay off amid elevated borrowing costs. - Hotter-than-expected U.S. inflation has renewed rate-hike concerns; Reuters reported these concerns were fueling selling in semiconductor and AI supply-chain stocks. - Shares have also fallen in each of the previous six sessions.