Questions tagged [portfolio]
A portfolio is a collection of financial instruments. We often collect instruments together to represent the complete holdings of an investor and to analyze the overall risk (which may be lower due to diversification, i.e the portfolio holding multiple instruments).
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Tangent portfolio weights without short sales?
Consider a mean-variance investor in a world with a risk-free asset.
Let $R_f>0$ be the return of the risk-free asset, $\mathbb{E}(R_i)>R_f$ the expected return of the risky asset $i$ and $SD(...
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how to find CVaR/AVaR for triangular fuzzy no
While going through different methods of risk measure i came across AVaR/CVaR, while i was calculating AVaR/CVaR in credibilistic environment using VaR, i got stuck in the calculations
eg. For ...
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internal rate of return ((M/X)IRR ?) of a fund
I have the following data for a fund. The contributions come from the LPs (i.e., the investors invest more in the fund, or withdraw money from the fund), MV stands for market value.
The timing is not ...
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Ranking assets by covariance vs correlation
After every change in portfolio (i.e. every trade), I need to calculate a price for each asset in my portfolio. But the calculator is slow. So I want to order the sequence of price updates, from the ...
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40 views
Portfolio Performance Attribution Using Carino Smoothing
I'm trying to conduct portfolio performance attribution using Carino smoothing, but it seems that the active returns do not match and I don't know why. Here is the example I use:
\begin{array} {|r|r|r|...
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Ito's differential in portfolio dynamics
I try to be as concise as possible. Basically I'm following the text "Arbitrage Theory in Continuous Time", by Tomas Bjork.
I put here the point where I'm stuck: Chapter 6 - Portfolio ...
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37 views
What is the formula for the global minimum variance portfolio with positive weights?
I know how to algebraically solve for the weights when short selling is allowed but I can’t seem to find the formula for when it’s strictly positive an the weights sum to 1 anywhere online.
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Why do only portfolios of indices show elliptical dependence?
Elliptical distributions imply an asymmetric relationship between variables such as financial returns of different assets. I'm guessing this is mainly due to skewness, although I might be wrong and ...
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53 views
Can I build an efficient frontier using matrix algebra?
If i have a vector of expected returns $A$, a covariance matrix $C$ and a vector of the corresponding weights $W$ for each investment, is it possible to generate the efficient frontier with vector ...
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36 views
Optimizing Portfolio Return by Targeting Variance
I understand Markowitz and targeting returns to minimize our variance. I know this optimization problem well and its constraints. However when the reverse scenario is to be considered I get very ...
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Density of a portfolio's returns is the weighted average of asset distributions?
The expected return of a portfolio can be formulated as a weighted average of the constituent assets' returns:
$$r_p = w_1 r_1 + w_2 r_2 + \dots + w_N r_N + \epsilon$$
Does it also follow that the ...
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50 views
Annualised returns and volatility for 3 month data
I have a portofolio with 30 indexes and I want to calculate the annulised returns and volatility because I want to compare it with another portofolio with different number of indexes (but same time ...
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Efficient portfolio standard deviation
Is annualized/ or average monthly standard deviation applied on the x-axis of efficient portfolio graph? Assuming expected annualized portfolio return is applied on the y-axis. thanks for your help!
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Assessing transaction costs of different portfolio strategies
I am trying to evaluate different dynamic allocation strategies based on the same stocks' universe according to their transaction costs. I was thinking to simply compute it as some sort of turnover ...
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Univariate Portfolio Analysis
We want to form 10 portfolios based on the level of VAR (99%) for equity data over a 30 year period. Portfolio 1 is the portfolio of stocks with the lowest value-at-risk and Portfolio 10 is the ...
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50 views
Option pricing PDE Black Scholes one-factor Hull-White (or Vasicek) model
I am trying to find the option pricing PDE of the Black Scholes one-factor Hull-White (or Vasicek) model using a self-financing portfolio strategy. The system is as following
\begin{equation*}
\begin{...
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26 views
Equity risk factors with daily rebalancing
I am building some well known equity factors on the S&P for research purposes. It means those are going to be used for general evaluation purposes but do not need to be replicable. Would it be a ...
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Variance of the risk systematic component in Fama and French Three Factor Model
in my assignment i have to compute the variance of the risk systematic component in the Fama and French Three Factor Model. Does anyone know the formula or how to compute it?
Thank you
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R - Portfolio construction based on own calculations, with rebalancing of components
I have used random forest in R to get probabilities for stocks being in a certain class. With those probabilities i would like to construct portfolios containing the 5 stocks with the highest ...
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2answers
83 views
Understanding what is 'special' about the security market line
I am trying to get my head around the CAPM model and all the intricacies of portfolio management. I have written some code to help me visualise what happens to the risk-return characteristics of my ...
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39 views
Variance/VaR calculation for a Portfolio
I'm considering a portfolio of multiple stocks (>2), and calculating their Standard Deviation/Variance and VaR for the portfolio. My question is about the below two ways to calculating them
Consider ...
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46 views
How to Calculate Discrete Currency Returns for Short Positions
I need to calculate currency returns for 1) short selling the currency and 2) going long in the currency. When going long, the currency is sold at Forward price $F_t$ and bought at spot price $S_{t+1}$...
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What does “invest in portfolio volatility” mean?
In this paper,
Barnea, Amir, Henrik Cronqvist, and Stephan Siegel. "Nature or nurture: What determines investor behavior?." Journal of Financial Economics 98.3 (2010): 583-604.
it is mentioned ...
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Visualise returns of n-asset portfolio as 2D plot, like heatmap?
It's possible to visualise both asset allocations and returns of 2-assets portfolio as 2D heatmap.
Like in image below, the visualisation of $[Gold, Silver]$ portfolio with restriction $Gold + ...
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71 views
Is optimising for the Final Wealth is the same as optimising log of growth rate in Kelly Criterion?
A direct, brute force approach could be used to find the Optimal Portfolio.
Consider simple play. There's a biased coin with 55% probability of win. The simulator play as a single person with 100$ ...
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What is the appropriate breakpoints for portfolio sorting (using CRSP stocks) based on size?
I want to sort stocks based on size. I use CRSP database from 1962 to 2018. My question is that in order to create quintiles, what is the appropriate breakpoints? and how can I calculate them?
I saw ...
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42 views
Tracking a portfolio's annualized return
Sorry for this dumb amateur question, but looking for some help.
I’ve created an Excel line chart that tracks a portfolio’s annualized rate of return. For example, a year ago the portfolio had an ...
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42 views
How long a time horizon should be for verifying the effectiveness of an investment strategy?
Question
To verify the effectiveness of a certain asset allocation strategy, how long a time horizon should be?
Is there any academic paper regarding this topic?
Question in more detial
I know ...
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54 views
Value of portfolio with fixed discrete dividends
I know that this is a very simple question, but i want to make sure to grasp the concept of ex dividend and value of portfolio.
Suppose that we have a two period binomial tree of a stock with initial ...
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1answer
88 views
Calculate return for a set of securities downloaded using quantmod
I downloaded adjusted closing price using quantmod for a set of securities. I want to calculate daily/weekly/monthly return for all securities. Usual dailyReturn, weeklyReturn etc not working. What do ...
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Another variation of the 'Sharpe ratio' in CVaR-based portfolio optimization?
Question
What is the ratio S(p) shown below? Do we have a name for it like 'Sharpe ratio'?
The ratio above is introduced in the academic paper Optimal portfolio selection in a Value-at-Risk framework
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711 views
Equal Risk Contribution in Portfolio Analytics r pkg
I am trying to estimate the weights of an equal risk portfolio using the PortfolioAnalytics package in r.
To start with, I have tried to redo the example provided in the portfolio vignette. The code ...
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47 views
Portfolio returns from activity records
I am looking for a clean and efficient way to obtain the portfolio returns from a list of activity records.
Specifically, the activity file consist of BUY, SELL, COVER, SHORT, etc. records with ...
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297 views
Mean-Variance Optimization Techniques with Multiple Asset Classes
Why does it make sense to use single-period Markowitz mean-variance optimization techniques when we're trying to figure out asset allocation across multiple asset classes (bonds, stocks, REITs, etc)?
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Differences Between Portfolio Daily Average Returns
I have a doubt about the average daily return for a 2 stock porfolio. I have the data of both stock returns over a 1511 day period. I used 2 approachs to calculate the average return.
In the first one,...
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128 views
In a FX options book, is the sum of P&L equal to the portfolio value?
For a portfolio containing FX options, would the sum of P&L for each option be the portfolio value?
