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English, 02.07.2019 07:00, mollyallen116365

Which word is more positive, asset or characteristic

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Mathematics, 19.10.2019 03:30, maleah12x
Leveraging. consider an asset with return time series over t periods given by the t vector r. this asset has mean return μ and risk σ, which we assume is positive. we also consider cash as an asset, with return vector ,'11, where 1 is the cash interest rate per period. thus, we model cash as an asset with return ,irl and zero risk. (the superscript in stands for risk-free'.) we will create a simple portfolio consisting of the asset and cash. if we invest a fraction θ in the asset, and i θ in cash. our portfolio return is given by the time series rf we interpret θ as the fraction of our portfolio we hold in the asset. we allow the choices θ > 1 . or θ < 0. in the first case we are bo,,owing cash and using the proceeds to buy more of the asset, which is called leveraging. in the second case we are shorting the asset. when θ is between 0 and 1 we arc blonding our investment in the asset and cash which is a form of hedging (a) derive a formula for the return and risk of the portfolio, i.e., the mean and standard deviation of p. these should be expressed in terms of μ, σ. μ' and θ check your formulas for the special cases θ 0 and θ 1. (b) explain how to choose θ so the portfolio has given target risk level σtar (which is positive). if there are multiple values of θ that give the target risk. choose the one that results in thec highest portfolio rcturn. (c) assume we choose the value of θ as in part (b). when do we use leverage? when do we short the asset? when do we hedge? your answers should be in english.
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