NO.PZ2018062007000090
问题如下：
Which of the following statements explains a characteristic of futures price limits? Price limits:
选项：
A.help the clearinghouse manage its credit exposure.
B.can typically be expanded intra- day by willing traders.
C.establish a band around the final trade of the previous day.
解释：
A is correct. Price limits are important in helping the clearinghouse manage its credit exposure. Sharply moving prices make it more difficult for the clearinghouse to collect from parties losing money. B is incorrect because typically the exchange rules allow for an expansion of price limits the next day (not intra- day) if traders are willing. C is incorrect because price limits establish a band relative to the previous day’s settlement price (not final trade).
中文解析：
A对，涨跌停限制可以管理信用敞口。
B错，B选项是说有些交易所的规则是可以在日内扩大涨跌停板的比例，这是不对的，因为由于市场行情剧烈而扩大涨跌停板比例是要隔日达成的。
C错，C选项是说价格限制的计算是基于前一个交易日的最后一笔交易指定的，这是不对的，因为当日的期货涨跌停板价格是基于前一日的结算价，而不是收盘价。结算价是根据前一天多笔交易的价格加权平均而成。
以及结算价和收盘价不是同一回事吗
