shows names that are stored in the
underlying_id slot of derivative
an optional regular expression. Only names matching ‘pattern’ are returned.
require exact match?
ls_derivatives, then looks for unique
underlying_ids. If no derivatives have been defined, nothing will be
chr vector of names of unique
ls_instruments_by, ls_derivatives, ls_options, ls_futures
1 2 3 4
## Not run: ls_underlyings() ## End(Not run)
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