美股AI应用软件股走高，Palantir涨超5%

Group 1 - The core viewpoint of the article highlights the rise in stock prices of AI application software companies in the US market, indicating a positive trend in this sector [1] Group 2 - Palantir's stock increased by over 5% [1] - Reddit's stock saw a rise of more than 7% [1] - Applovin's stock experienced an increase of over 6% [1]