【案情简介】2009年2月23日,严某与A期货公司签订一份《期货经纪合同》,约定严某委托A期货公司从事期货交易。合同中,双方通过约定客户风险率及交易所风险率来控制交易风险,其中第五十条约定,由于市场行情急剧变化,导致严某资金账户的交易所风险率≥100%时,A期货公司有权在不 【Brief introduction of the case】 February 23, 2009, Yan and A futures company signed a “futures brokerage contract,” agreed Yan commissioned a futures company engaged in futures trading. In the contract, the two sides control the transaction risk by agreeing the customer risk rate and the risk rate of the exchange. Article 50 of the agreement stipulates that due to the drastic change of the market conditions, when the risk rate of an exchange rate of a capital account is not less than 100%, A Futures Company Right to not