Unsubscribe securities
stop(c)
stop(c,d)
stop(c) unsubscribes all securities associated
with the Reuters session object c.
stop(c,d) unsubscribes the securities
associated with the subscription handle d, where d is
the subscription handle returned by reuters/fetch.
Unsubscribe securities associated with a specific request d and a
Reuters connection object
c:
stop(c,d)
c:stop(c)