Group 1 - STMicroelectronics stock experienced a significant sell-off, closing down 13.1% despite positive market trends, with the S&P 500 up 0.6% and the Nasdaq Composite up 0.9% [1] - The company reported third-quarter earnings that exceeded Wall Street expectations, with non-GAAP adjusted earnings per share at $0.29 compared to the expected $0.22, and revenue of $3.19 billion surpassing the forecast of $3.17 billion [3][7] - Despite the earnings beat, the company's forward guidance and lower-than-expected gross margin of 33.2% contributed to investor concerns, leading to the stock's decline [4][6] Group 2 - The midpoint guidance for full-year sales is approximately $11.75 billion, slightly below the average analyst estimate of $11.79 billion [5] - Investor confidence has waned due to the weaker sales outlook and softer gross margins, despite the potential for improved Q4 performance [6] - Overall, while STMicroelectronics showed strong performance in Q3, the outlook for future sales and margins has raised concerns among investors [7]