4月9日的美国股市迎来历史性时刻。虽然当天早些时候，美股的走势仍然平淡无奇，但当特朗普宣布暂停实施当天生效的对部分国家"对等关税"90天的消息 后，美股平地响惊雷，出现暴涨走势。 截至当天收盘，道指大涨超2900点，涨幅达7.87%，为2020年3月25日以来的最大涨幅；标普500指数大涨9.52%，为2008年10月29日以来的最大涨幅；纳指 大涨12.16%，为史上第二大单日涨幅。因此，当天美股的上涨足以载入美股的史册。 这样的上涨其实也是投资者所期待的。毕竟最近几天的美股也与全球股市一样，都深受"关税风波"的困扰而出现动荡的走势。以道琼斯指数为例，从4月3日 到4月7日，三个交易日最多跌去了5613.54点，跌幅达到了13.29%。因此，美股出现4月9日这样的大涨，是投资者梦寐以求的。 不过，4月9日美股的暴涨却给美国总统特朗普带来了不小的麻烦。多位美国参议员周三（4月9日）就站出来抨击并怀疑称，特朗普的决策背后是否存在内幕 交易的空间和动机？其中，最为引人瞩目的，无疑当属当地媒体对美国加州民主党参议员亚当·希夫(Adam Schiff)的一段采访。他在采访中呼吁美国国会调 查特朗普在突然暂停一系列全面 ...

Group 1 - Market experts indicate that recent market volatility has led to record-high options trading volumes, making it difficult to assess suspicious trades [1] - Interactive Brokers' chief strategist Steve Sosnick notes the significant trading volume and volatility, expressing uncertainty about whether the savvy buying is normal or indicative of malicious trading [1] - Cboe Global Markets' VP Henry Schwartz states that it is unclear if buyers were simply lucky, and he has not found any evidence to support claims of manipulation [1] Group 2 - The White House has not directly addressed concerns about market manipulation, with spokesperson Kush Desai emphasizing the president's responsibility to assure economic security amid media-induced panic [1] - The SEC has refrained from commenting, although it has previously acted against insider trading related to options [1] - House Democratic leader Jeffries mentions that some lawmakers will actively seek answers and transparency regarding stock purchases made in recent days [1] Group 3 - California Democratic Senator Schiff calls for a congressional investigation into whether Trump was involved in insider trading or market manipulation, citing the damaging effects of fluctuating tariff policies [2] - Trump's trade representative, Jamieson Greer, appeared unaware of Trump's decision to suspend tariffs while testifying before a House committee, which raises questions about intentional market manipulation [2]