PZ2019052801000019 坐市商自己承担风险么?讲义P20写:based on a desire of ... and hedging any risk..有三个小问题:1) 既然是desire,说明坐市商自己还是会承担风险的。这么理解对么?并且讲义下面一行还提到了坐市商是通过转移风险的方式来管理风险的。2) 如果这样,为什么选项A不对?A选项是 they are in a position where they face risk associated with the the price of an asset。3) 为什么给的答案是D选项,而D选项提到market makers 也在exchange-traded market。坐市商不应该只出现在OTC市场么?