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2018 | OriginalPaper | Buchkapitel

8. Portfolio Management

verfasst von : Selim S. Hacιsalihzade

Erschienen in: Control Engineering and Finance

Verlag: Springer International Publishing

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Abstract

This Chapter first looks at an approach for methodically diversifying among different assets, the so-called Modern Portfolio Theory (MPT), as applied to equity stocks. Empirical studies with examples from Swiss, Turkish and American stock markets are presented. Smart algorithms for managing stock portfolios based on these empirical studies are proposed. Management of bond portfolios using the Vašíček model and static bond portfolio management methods finish off this chapter.

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Fußnoten
1
Harry Markowitz, American economist, (1927–).
 
2
Robert Merton, American economist (1944–).
 
3
Short selling is the selling of securities, especially stocks, that are not currently owned by the investor with the promise to repurchase (“cover”) them sometime in the future. If the price of the stock declines, the short seller will profit, because the cost of covering will be less than the proceeds received from the initial short sale (see Chapter 9). This practice dates back to the beginning of the 17th century [126]. Because short selling can exert downward pressure on the underlying stocks and thus drives down the stock prices, many countries do not allow short selling. A recent example is China in 2015 [13].
 
4
MATLAB’s Optimization Toolbox offers a very efficient algorithm based on trust region [22] which can be used very effectively for this purpose.
 
5
A random walk is a mathematical formalization of a path that consists of a succession of random steps.
 
6
d is used as an index and not an exponent in the formulas of this section.
 
7
Note that the multi-dimensional geometric Brownian motion model used here is based on the stochastic differential equation in Section 5.​7.​2.
 
8
Transaction cost is composed of the difference between the ask and prices on the stock exchange (spread) and the commission the bank or the stock broker charges on each trade.
 
9
The Dow Jones Industrial Average is an index that shows how 30 largest publicly owned companies based in the United States have traded during a standard trading session in the stock market.
 
10
IMKB30 (now called BIST30) is an index that shows 30 publicly owned companies with the biggest market capitalization based in Turkey.
 
11
Swiss Market Index comprises the 20 largest publicly owned companies based in Switzerland.
 
12
This Chapter makes extensive use of Efe Doğan Yılmaz’s Master Thesis [139] and Bachelor Theses of Yasin Çotur [31], Ceren Sevinç [119] and Mehmet Hilmi Elihoş [37], all at the Boğaziçi University.
 
13
This section draws on [133] and replicates parts of it.
 
14
Oldřich Vašíček, Czech mathematician, (1942–).
 
15
One notable exception is the perpetual bond described in Chapter 7.
 
Metadaten
Titel
Portfolio Management
verfasst von
Selim S. Hacιsalihzade
Copyright-Jahr
2018
DOI
https://doi.org/10.1007/978-3-319-64492-9_8

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