8.5 Returns in an Uncertain World (Expectations and Probabilities)

As you have just seen, when looking at events that have already happened, we can summarize them with statistics such as average or mean, variance, and standard deviation. These statistical tools help us understand the history of certain investment choices.

A graph showing historical returns and standard deviations of four investments, using the information from Table 8.2.

Figure 8.3

Historical returns and standard deviations of bonds and stocks. T = T reasury bills, B = government bonds, L = large-company stocks, and S = small-company stocks.

Description

The horizontal axis of the graph is labeled Risk as measured by

The vertical axis is labeled Historical return.

Four points (labeled T, ...

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