The technology sector is experiencing a significant pre-market downturn, with the XLK ETF down -2.30%. This sell-off appears to be triggered by disappointing earnings guidance from key semiconductor equipment manufacturer Lam Research (LRCX), which fell sharply in after-hours trading. This has sparked broader concerns about the sustainability of the recent rally in artificial intelligence (AI) related stocks, leading to a wider tech sell-off. Negative sentiment is also being fueled by a mixed earnings report from Tesla (TSLA).