After the foreign key constraint with index disabled is dropped and recreated, the reversion completes successfully.

终止和重新创建索引禁用的外键之后，降级就成功完成了。

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The article analyzed the reasons that aroused the mean reversion in stock index futures, and the calculation methods of the coefficient of the first-order autocorrelation in basis change.

阐述了指数期货中均值回复现象产生的原因，并进而分析了基差变化中的一阶自相关系数在不同情况下的计算方法。

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Instead they ride the index up and then down again without locking in profits or selling losers to reinvest proceeds during the reversion.

FORBES: Wake Up! Buy And Hold Doesn't Work