Or are you going to manage each individual asset class actively, trying to beat the market and generate risk-adjusted excess returns?

还是积极管理每项资产,力求获得市场水平以上的回报率,以及风险调整后的超额收益

耶鲁公开课 - 金融市场课程节选

The second, market timing, deals with short-term deviations from the long-term asset allocations that you establish.

第二,市场时机选择涉及,偏离长期资产配置的短期操作

耶鲁公开课 - 金融市场课程节选

Those three tools are asset allocation, market timing, and security selection.

这些工具是,资产配置,市场时机选择和证券选择

耶鲁公开课 - 金融市场课程节选

You have to limit your exposure to risky asset classes to a level that allows you to sustain those positions even in the face of terribly adverse market conditions.

你必须把手中持有的风险资产,限制在一个合适的比例水平,并且即使到了最差的市场环境下,你依旧能够承受这些风险资产

耶鲁公开课 - 金融市场课程节选

So, it's not surprising that asset allocation explains more than 100% of returns and that, for the community as a whole, market timing and security selection are costly and lower the community's aggregate investment returns.

因此资产配置能解释100%以上的回报,也不足为奇了,对投资者整体来说,市场时机选择,和证券选择是有代价的,降低了总的投资回报

耶鲁公开课 - 金融市场课程节选

1, 10% it means that if the market portfolio goes up 10% in value 10% then this asset also goes up 10% in value.

当β等于1时，If，β,表明若市场组合增值,该资产也同时增值。

耶鲁公开课 - 金融市场课程节选

Again, I'm not going to spend much time on this, of the ith asset is the regression coefficient when you regress the return on the ith asset on the return of the market portfolio.

再强调一次，我不打算花太多时间在这个等式上面，但要注意的是当你想将市场组合收益，but，the，β,回归到第i资产收益中去,第i资产β系数是线性回归方程的,回归系数。

耶鲁公开课 - 金融市场课程节选