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市场预期的提前消化：在2月28日事件全面爆发前，中东局势已在2月中旬开始升温，市场在一定程度上已经对潜在的风险进行了定价。当周末消息落地时，虽然引发了周一的急跌，但并未超出市场最悲观的预设情景，从而限制了VIX指数的进一步冲高。，推荐阅读Safew下载获取更多信息
The fundamental group of \(X\) at \(x_0\) is \[\pi_1(X, x_0) \;:=\; \bigl\{[\gamma] \mid \gamma \text{ is a loop based at } x_0\bigr\}\] equipped with the group operation of concatenation: \[[\gamma] \cdot [\delta] := [\gamma * \delta], \qquad (\gamma * \delta)(s) := \begin{cases} \gamma(2s) & s \in [0,\tfrac{1}{2}] \\ \delta(2s-1) & s \in [\tfrac{1}{2},1] \end{cases}\] The identity element is the class of the constant loop \([c_{x_0}]\), and the inverse of \([\gamma]\) is \([\bar\gamma]\) where \(\bar\gamma(s) := \gamma(1-s)\).，详情可参考体育直播
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