This function computes the solution of a minimum tail dependent portfolio (longonly).
1 2 
Returns 
A rectangular array of return data. 
method 
Character, the type of nonparametric estimation. 
k 
Integer, the threshold value for the order statistic. If left

percentage 
Logical, whether the weights shall be returned as decimals or percentages (default). 
optctrl 
Object of class 
... 
Arguments are passed down to 
Akin to the optimisation of a global minimumvariance portfolio, the
minimum tail dependennt portfolio is determined by replacing the
variancecovariance matrix with the matrix of the lower tail
dependence coefficients as returned by tdc
.
An object of formal class "PortSol"
.
The optimisation is conducted by calling cccp()
.
Bernhard Pfaff
tdc
, "PortSol"
1 2 3 4  data(StockIndex)
Rets < returnseries(StockIndex, method = "discrete", trim = TRUE,
percentage = TRUE)
PMTD(Rets)

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