--- title: "US Market Open: Nasdaq up 0.85%, Philadelphia Semiconductor Index up 2.5%, memory chip stocks broadly rise, AMD up ~3%" type: "News" locale: "en" url: "https://longbridge.com/en/news/293221767.md" description: "Major US indices rose at the open, with the Nasdaq up 0.85%, the S&P 500 up 0.5%, and the Dow Jones Industrial Average up 0.3%. Memory chip stocks performed strongly, with Sandisk, SK Hynix, and Micron Tech all rising approximately 4%-5%. AMD gained about 3%, boosted by news of Microsoft deploying its Helios solution. Most Chinese concept stocks moved higher, with Alibaba, Baidu, and Bilibili all rising around 3%-4%" datetime: "2026-07-20T13:34:13.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/293221767.md) - [en](https://longbridge.com/en/news/293221767.md) - [zh-HK](https://longbridge.com/zh-HK/news/293221767.md) --- # US Market Open: Nasdaq up 0.85%, Philadelphia Semiconductor Index up 2.5%, memory chip stocks broadly rise, AMD up ~3% The Dow Jones Industrial Average rose 0.3%, and the S&P 500 index rose 0.5%. Memory chip stocks broadly rose, with Sandisk up approximately 5%, SK Hynix up approximately 4%, and Micron Tech up approximately 4%. AMD rose about 3%, following reports that Microsoft will deploy AMD's Helios rack-level solution. 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