美股科技股拉升，谷歌涨超4%

Group 1 - The core viewpoint of the article highlights the positive performance of the US stock market, with major indices showing gains on February 20, including a 0.47% increase in the Dow Jones, a 0.69% rise in the S&P 500, and a 0.9% uptick in the Nasdaq [1] - Major US tech stocks experienced significant increases, with the index tracking the seven largest US tech companies rising by 1.57%, and Google seeing a rise of over 4% following the release of its new foundational model, Gemini 3.1 Pro [1] - The new Gemini model reportedly doubles the inference performance compared to its predecessor, Gemini 3 Pro, which was released in November of the previous year [1] Group 2 - Other notable tech stocks also saw gains, with Netflix and Amazon both increasing by over 2%, while Apple, Nvidia, and Meta rose by more than 1% [1]