投資組合

Multi tool use投資組合(Investment portfolio),又名資產投資組合,所重視的是資產,例如股票、债券、外幣、期权、貴金屬、金融衍生工具、房地产、土地、古董、上市公司地位(俗稱「殼」)、藝術品、及至紅酒等。一個投資組合是一個投資者手上持手的資產性投資組合的成分,其中可分類為進取型、保守型等。一個優質的資產投資組合最理想的是具高流動性、平穩及较高收益、低投資風險等。
資產投資組合的成份不會包括消費品,例如跑车、电视机、化妝品、成衣等,因為它們都並無增值潛力,甚至只有折舊。
投资组合风险和收益的计算如下:
Portfolio Risk
For Example Correlation Coefficient = .4
Stocks | σ | % of Portfolio | Avg Return
|
---|
ABC Corp | 28 | 60% | 15%
|
Big Corp | 42 | 40% | 21%
|
Standard Deviation = weighted avg = 33.6 (Brealey, 2010 p.165) &(Brealey, 2010 p.170): The expected return on your portfolio is simply a weighted average of the expected returns on the individual stocks: Expected portfolio return=股票1的标准偏差σ1乘以x1股票1的投资组合所占百分比例+投资品2的标准偏差σ2乘以x2投资产品2所占的百分比例=σ1*r1+σ2*r2;
Standard Deviation
Portfolio Variance = 28.1 =x21σ21+x22σ22+2(x1x2ρ12σ1σ2)
Real Standard Deviation:
= (28)(.6) + (42)(.4) + 2(.4)(.6)(28)(42)(.4)
= 28.1 CORRECT
投资组合收益Return : r = (15%)(.60) + (21%)(.4) = 17.4%
delta是标准偏差Standard deviation,离正态分布远的偏差就大。
delta=variance投资组合方差的开平方,variance方差的算术平方根。方差计算公式如下:
Portfolio variance投资组合方差=x21σ21+x22σ22+2(x1x2ρ12σ1σ2)
Expected portfolio return=stock1 return * stock1 percent of portfolio + stock2 return * stock2 percent of portfolio
Reference:《Principles of Corporate Finance》10th Edition, Brealey 2010
相關
- 投资
- 证券投资基金
- 财务管理
- 个人理财
- 強積金
- VaR
- REITs
投資策略、投資心法
外參考
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