2月20日美股成交额前20：美银称投资者对英伟达过于乐观

【2月20日美股成交额前20：美银称投资者对英伟达过于乐观】周二美股成交额第1名英伟达收跌4.35%，成交额479.28亿美元。该公司将在周三收盘后公布财报。投资者对其天价估值与产品竞争前景表示担忧。美银分析师Arya评论称，投资者对英伟达公司的财报预期过于乐观，这抑制了英伟达超越预期的潜力，使该公司容易出现波动，目前财报后隐含波动率为11%。有报道称一家名为Groq的人工智能解决方案初创公司推出的AI芯片推理速度较英伟达GPU提高10倍、成本只有英伟达的1/10。还有消息称，微软公司正在开发一种新的网卡，用来提高其人工智能芯片Maia的性能，最终达到减少对英伟达产品依赖的目的。https://cj.sina.cn/article/norm_detail?url=https://finance.sina.com.cn/stock/usstock/c/2024-02-21/doc-inaitsvq6336736.shtml","multimedia":{"img_url":["https://n.sinaimg.cn/zhibo/11/w1080h4531/20240221/c4d2-38b7335378df8e724908bc26c337cc48.png"]},"commentid":"live:finance-152-3497791:0","compere_id":0,"creator":"zhangjun@staff.sina.com.cn","mender":"zhangjun@staff.sina.com.cn","create_time":"2024-02-21 05:29:59","update_time":"2024-02-21 05:30:02","is_need_check":"0","check_time":"1970-01-01 08:00:01","check_status":"1","check_user":"","is_delete":0,"top_value":0,"is_focus":0,"source_content_id":"0","anchor_image_url":"","anchor":"直播员","ext":"{"stocks":[{"market":"us","symbol":"bac","key":"u7f8eu94f6"},{"market":"us","symbol":"nvda","key":"u82f1u4f1fu8fbe"},{"market":"fund","symbol":"161631","key":"u4ebau5de5u667au80fd"},{"market":"fund","symbol":"515980","key":"u4ebau5de5u667au80fd"},{"market":"fund","symbol":"159813","key":"u82afu7247"},{"market":"hk","symbol":"04338","key":"u5faeu8f6f"},{"market":"us","symbol":"msft","key":"u5faeu8f6f"}],"needPushWB":false,"needCMSLink":true,"needCalender":false,"docurl":"https:\/\/finance.sina.com.cn\/7x24\/2024-02-21\/doc-inaitsvt0894165.shtml","docid":"naitsvt0894165"}","old_live_cid":"0","tab":"","is_repeat":"0","tag":[{"id":"2","name":"行业"},{"id":"3","name":"公司"},{"id":"4","name":"数据"},{"id":"5","name":"市场"},{"id":"6","name":"观点"},{"id":"202","name":"原创"}],"like_nums":0,"comment_list":{"list":[],"total":0,"thread_show":0,"qreply":0,"qreply_show":0,"show":0},"docurl":"https://finance.sina.cn/7x24/2024-02-21/detail-inaitsvt0894165.d.html","rich_text_nick_to_url":[],"rich_text_nick_to_routeUri":[],"compere_info":""},{"id":3497782,"zhibo_id":152,"type":0,"rich_text":"派拓网络（PANW）美股盘后跌超13.1%。