determines (or estimates) the expiration from an xts object by either
finding the last row that is not NA or by passing the name/symbol
of the xts object to expires.character
Usage
## S3 method for class 'xts'
expires(x, Date, expired = TRUE, silent = FALSE,
src = c("data", "instrument"), ...)
Arguments
src
either “data” or “instrument”.
Value
If src is “data”, the returned value will be the
index of the last price that is not NA (price is determined by
quantmod:::getPrice. getPrice arguments symbol and
prefer can be passed through dots.)
If src is “instrument” the symbol of the xts object will
be passed to expires.character