Traders placed an unusually large number of bets on two obscure companies at the start of last week, days before a disclosure by chipmaker Nvidia triggered a furious rally in their shares.
上周伊始，交易員們對兩家名不見經傳的公司下了異常大的賭注，幾天后芯片制造商英偉達披露的消息引發這兩支股票大漲。
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