Calculates Sortino ratio from vector of gains or prices. The formula is:
(mean(gains) - rf) / sd(gains[gains < 0]), where rf is some
risk-free rate of return.
Usage
sortino(gains = NULL, prices = NULL, rf = 0)
Arguments
gains
Numeric matrix with 1 column of gains for each investment (can
be a vector if there is only one).
prices
Numeric matrix with 1 column of prices for each investment (can
be a vector if there is only one).
# NOT RUN {# Simulate daily gains over a 5-year periodset.seed(123)
stock.gains <- rnorm(252 * 5, 0.0005, 0.01)
# Calculate Sortino ratio using risk-free return of 0sortino(stock.gains)
# }