Super Micro Computer (SMCI) and Nvidia (NVDA) experienced significant stock declines, leading a broad-based tech selloff. SMCI shares plummeted by 25% after the company announced its Q3 earnings date without preliminary estimates, diverging from its usual practice of pre-announcing results. This unexpected move led to its worst trading day in two months. Concurrently, Nvidia saw a substantial drop, with its shares falling below $800 for the first time since March 1, marking a 20% decline from its March high and a daily loss of 10%. The broader tech sector faced downward pressure, contributing to a notable reduction in market capitalization for both companies.