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Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios Aula 03 - Fronteira Eficiente
Marcos V. L. Pereira
Universidade Federal de São Joao del-Rei
marcos.vinicius@ufsj.edu.br
Sala 114.2
28 de Março de 2015
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 1 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Resumo
1 Portfólios
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 2 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Portfólios na Fronteira Eficiente
Portfólio de variância mínima (PVM)
minimize σx
sujeito a:
N
i=1
xi = 1
onde:
σx =
N
i=1
N
j=1
σijxi xj
Para N = 2, tem-se o lagrangiano:
L(x1, x2, λ) = σ11x2
1 + σ22x2
2 + 2σ12x1x2 + λ · (x1 + x2 − 1)
Onde está localizado o mínimo da função L(x1, x2, λ)?
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 3 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Portfólios na Fronteira Eficiente
Portfólio tangente (PT)
maximize rf +
N
i=1
(µi − rf )xi − τ · σx
sujeito a:
N
i=1
xi = 1
onde:
τ ∈ R∗
; σx =
N
i=1
N
j=1
σijxi xj
Para N = 2, tem-se a função:
F(x1, x2) = rf + (µ1 − rf )x1 + (µ2 − rf )x2+
τ · (σ11x2
1 + σ22x2
2 + 2σ12x1x2)
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 4 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Portfólios na Fronteira Eficiente
Normalização
Os pesos do portfólio tangente obtido não possuem soma igual
a 1, portanto devem ser reescalonados ao final do cálculo.
Invarância
O resultado obtido é sempre o mesmo após a normalização,
independente do valor de τ. Desde que τ seja diferente de
zero, obviamente.
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 5 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Links interessantes
1 http://pregao-online.bmfbovespa.com.br
2 http://www.infomoney.com.br/mercados
3 https://www.google.com/finance
4 http://www.bmfbovespa.com.br/indices/
ResumoCarteiraTeorica.aspx?Indice=IBrX&idioma=
pt-br
5 http://finance.yahoo.com/ (NUNCA USEM ESSE
SITE COMO BASE DE DADOS)
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 6 / 7
Engenharia
Financeira
Marcos V. L.
Pereira
Portfólios
Dúvidas?
Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 7 / 7

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03 engenharia financeira - fronteira eficiente, pvm e pt (incompleto)

  • 1. Engenharia Financeira Marcos V. L. Pereira Portfólios Aula 03 - Fronteira Eficiente Marcos V. L. Pereira Universidade Federal de São Joao del-Rei marcos.vinicius@ufsj.edu.br Sala 114.2 28 de Março de 2015 Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 1 / 7
  • 2. Engenharia Financeira Marcos V. L. Pereira Portfólios Resumo 1 Portfólios Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 2 / 7
  • 3. Engenharia Financeira Marcos V. L. Pereira Portfólios Portfólios na Fronteira Eficiente Portfólio de variância mínima (PVM) minimize σx sujeito a: N i=1 xi = 1 onde: σx = N i=1 N j=1 σijxi xj Para N = 2, tem-se o lagrangiano: L(x1, x2, λ) = σ11x2 1 + σ22x2 2 + 2σ12x1x2 + λ · (x1 + x2 − 1) Onde está localizado o mínimo da função L(x1, x2, λ)? Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 3 / 7
  • 4. Engenharia Financeira Marcos V. L. Pereira Portfólios Portfólios na Fronteira Eficiente Portfólio tangente (PT) maximize rf + N i=1 (µi − rf )xi − τ · σx sujeito a: N i=1 xi = 1 onde: τ ∈ R∗ ; σx = N i=1 N j=1 σijxi xj Para N = 2, tem-se a função: F(x1, x2) = rf + (µ1 − rf )x1 + (µ2 − rf )x2+ τ · (σ11x2 1 + σ22x2 2 + 2σ12x1x2) Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 4 / 7
  • 5. Engenharia Financeira Marcos V. L. Pereira Portfólios Portfólios na Fronteira Eficiente Normalização Os pesos do portfólio tangente obtido não possuem soma igual a 1, portanto devem ser reescalonados ao final do cálculo. Invarância O resultado obtido é sempre o mesmo após a normalização, independente do valor de τ. Desde que τ seja diferente de zero, obviamente. Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 5 / 7
  • 6. Engenharia Financeira Marcos V. L. Pereira Portfólios Links interessantes 1 http://pregao-online.bmfbovespa.com.br 2 http://www.infomoney.com.br/mercados 3 https://www.google.com/finance 4 http://www.bmfbovespa.com.br/indices/ ResumoCarteiraTeorica.aspx?Indice=IBrX&idioma= pt-br 5 http://finance.yahoo.com/ (NUNCA USEM ESSE SITE COMO BASE DE DADOS) Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 6 / 7
  • 7. Engenharia Financeira Marcos V. L. Pereira Portfólios Dúvidas? Marcos V. L. Pereira (UFSJ/CAP) Engenharia Financeira 28 de Março de 2015 7 / 7