Chip stocks rocketed on Thursday after strong tech earnings from Microsoft and Lam Research sparked a widespread rally, fueling double-digit gains for hard-hit semiconductor companies. Lam Research shares popped 18% and headed for their best day since 1999. The company posted strong earnings and guidance on artificial intelligence-driven demand. Microsoft popped 15% after signaling strong growth in its Azure business and lifting capital expenditures on robust demand. Shares headed for their best...