Selling the stock after the price rises and making money from prices fluctuation is speculative.

等股票涨价后卖掉，赚买卖的差价则是投机性的。

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Section 3, from chapter 6 to chapter 7, study the relationship between asset prices fluctuation and financial system stability.

第三部分，资产价格波动对金融系统稳定的影响，包括第六和第七章。

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The basic viewpoints are as follow: 1. Cycle: 12 and 6 months are the common characteristic cycle in vegetables prices fluctuation.

本文基本观点如下：1。周期：12月与6月是蔬菜价格波动中普遍存在的特征周期。

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Prior to the housing collapse, fluctuation in house prices was the familiar story of supply and demand.

FORBES: How Is Federal Housing Policy Populist When Prices Are Rising?

As a result of the integration between the sugar and beverage businesses, Cultiba benefits from a natural hedge against fluctuation in sugar prices.

FORBES: Juan Gallardo Thurlow

For more sophisticated investors, or those with investing capital that exceeds a few hundred dollars, there are significant drawbacks to investing in gold-specific ETFs that go beyond the day-to-day fluctuation of gold prices.

FORBES: The Gold Showdown: ETFs Vs. Futures