25. Conclusion

This book changes our understanding of corporate finance, investments, taxation, and rating procedures. It shows that the most used principles of financial management should be changed in accordance to BFO theory (Filatova et al., Bull FU 48:68–77, 2008; Brusov and Filatova, Finance Credit 435:2–8, 2011; Brusov et al., Appl Financ Econ 21:815–824, 2011a, Res J Econ Bus ICT 2:16–21, 2011b, Res J Econ Bus ICT (UK) 2:11–15, 2011c, Appl Financ Econ 22:1043–1052, 2012a, J Rev Global Econ 1:106–111, 2012b, J Rev Global Econ 2:94–116, 2013a, J Rev Global Econ 2:183–193, 2013b, Cogent Econ Finance 2:1–13, 2014a, J Rev Global Econ 3:175–185, 2014b, Modern corporate finance, investment and taxation. Springer, Berlin, 2015, J Rev Global Econ 7:104–122, 2018a, J Rev Global Econ 7:88–103, 2018b, J Rev Global Econ 7:63–87, 2018c, J Rev Global Econ 7:37–622018d). Many of discoveries made within this theory still require interpretations and understanding as well as incorporation into real finance and economy. But it is clear now that without very serious modification of the conceptions of financial management, it is impossible to adequately manage manufacture, investments, taxation, and rating procedures, as well as finance in general.

The book has destroyed some main existing principles of financial management: among them is the trade-off theory, which was considered as a keystone of formation of optimal capital structure of the company during many decades. It was proved by the authors that the balance between advantages and shortcomings of debt financing could not provide the optimal capital structure for the company at all [and an explanation (nontrivial) to this fact has been done]. A new mechanism of formation of the company’s optimal capital structure, different from the ones suggested by trade-off theory, has been suggested in monograph.

A new qualitatively new effect in corporate finance has been discovered by the authors: decreasing of cost of equity k _e with leverage L. This changes the conceptions of dividend policy of company very significantly.

A very important discovery has been done recently by the authors within BFO theory. It is shown for the first time that valuation of weighted average cost of capital (WACC) in the Modigliani–Miller theory (perpetuity limit of BFO theory) (Modigliani and Мiller, Am Econ Rev 48:261–297, 1958; Am Econ Rev 53:147–175, 1963; Am Econ Rev 56:333–391, 1966) is not minimal and valuation of the company capitalization is not maximal, as all financiers supposed up to now: at some age of the company (“golden age”), its WACC value turns out to be lower than in the Modigliani–Miller theory, and company capitalization V turns out to be greater than V in Modigliani–Miller theory (see Chaps. 18 and 19).

Existing rating methodologies have a lot of shortcomings. A new approach to rating methodology is suggested. Chapters 21 and 22 are devoted to rating of nonfinancial issuers, while Chap. 23 is devoted to long-term project rating. The authors create a new base for rating methodologies. New approach to ratings and rating methodologies allows to issue more correct ratings of issuers and makes the rating methodologies more understandable and transparent.