他试图操纵股票价格。
证券交易委员会还对股票发行后的交易情况实行监督和调控，以防止有人操纵市场上的股票价格。
The SEC oversees trading in stocks after their distribution as well, administering regulations designed to prevent manipulation of the price of a stock traded on the market.
股票价格操纵的主体主要为机构投资者，其中券商和基金公司较多；
Most manipulators are institutional investors, of which the brokerages and fund companies form the main part;
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