Nowadays, most of the empirical studies and models concern average properties like expected returns, volatility, or correlations, and little attention has been given to the extreme movements.

目前，很多有关金融风险的研究都是针对均值、方差、相关性，很少有人关注极端的波动情况。

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The average for all properties tracked by Trulia is only 10%.

该公司跟踪的全部房产的平均降幅只有10%。

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On YouTube, however, people watched an average of 74 videos in July, while they watched only around 10 videos on Microsoft's sites and 19 on Viacom's online video properties.

但是，在Youtube上，7月份每个人平均下来观看的视频数量是74个，而他们在微软站点上观看的视频数量大约只有10个，而在维亚康姆视频站点上观看的视频数量为19个。

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That's a far cry from the 6.5% AvalonBay earns on average from the properties it builds.

FORBES: Magazine Article

Since the height of the market five years ago the average price of terraced properties has fallen by 27%, with flats down 23%.

BBC: Detached house values 'up ?100,000' over past decade

Average percentage yields from rented properties are still in the high single digits, so demand persists.

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