Stock market seasonal fluctuation is a part of short time fluctuation theory in stock investment return. This kind of phenomenon exists in the stock market of a lot of countries.

股票市场季节性波动是股票投资收益的短期波动理论，这种现象在许多国家的股票市场中存在。

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Simultaneously, it should also shorten the price regulation time as short as possible, and smooth the price fluctuation to increase the social benefits of peak and valley price policy.

同时，尽可能缩短电价调整时间，平稳价格波动，提高峰谷电价政策的社会效益。

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GM (1, 1) is good for short time, few data, and small fluctuation.

灰色GM(1,1)模型主要用于时间短、数据少、波动小的预测问题。

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