Next, Figure 1 plots growth rates in capital expenditures (COMPUSTAT item#128) around the portfolio formation year for portfolios based on size and b/m.We compute portfolio growth rates similar to the method of Fama and French(1995). In particular, to deal with the problem that earnings are sometimesnegative for small-stock portfolios, they look at the evolution of the ratio ofequity income for a portfolio to equity income for the market, EIp(t)/EIm(t),relative to the same ratio for year 0. The two ratios are averaged separatelyacross portfolio formation years. In addition, the ratios are standardized sothat they are equal to 1.0 for all portfolios in the year of portfolio formation.Wefollow the same approach to compute growth rates in capital expenditures forthe graph shown in Figure 1. Figure 1 shows that high b/m firms reduce theirinvestment activity for the 3 years prior to portfolio formation, while low b/mfirms accelerate capital spending. Thus, low b/m firms appear to be exercisinggrowth options prior to year zero.
Next, Figure 1 plots growth rates in capital expenditures (COMPUSTAT item#128) around the portfolio formation year for portfolios based on size and b/m.We compute portfolio growth rates similar to the method of Fama and French(1995). In particular, to deal with the problem that earnings are sometimesnegative for small-stock portfolios, they look at the evolution of the ratio ofequity income for a portfolio to equity income for the market, EIp(t)/EIm(t),relative to the same ratio for year 0. The two ratios are averaged separatelyacross portfolio formation years. In addition, the ratios are standardized sothat they are equal to 1.0 for all portfolios in the year of portfolio formation.Wefollow the same approach to compute growth rates in capital expenditures forthe graph shown in Figure 1. Figure 1 shows that high b/m firms reduce theirinvestment activity for the 3 years prior to portfolio formation, while low b/mfirms accelerate capital spending. Thus, low b/m firms appear to be exercisinggrowth options prior to year zero.<br>
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