Astera Labs is trading 4.1% lower at $345.69 as a broad risk-off move weighs on technology and semiconductor shares. - The S&P 500 is down 0.65% and the Nasdaq Composite 1.12%; Treasury yields remain elevated after strong economic data increased interest-rate concerns. - No fresh company-specific announcement was identified for September 24, 2026. Recent Leo memory-product news remains positive but does not explain the decline.