Yes, most stock-broking firms (and others in the securities industry) I've
had contact with do routinely record all incoming calls. There is no
warning, no beeps, and no other indication that the calls are being recorded.
It seems reasonable in this case (as for journalists wanting to verify a
quotation) so that there is a record for the inevitable times when the
contents of the call will be questioned.
I very much doubt this practice is illegal in these circumstances, but it
is interesting there's no regular beeps or warning message.
Telstra introduced a recorded message saying "This call may be recorded for
quality control purposes, please notify us if you don't want to be
recorded" and may well record all calls, having given this warning (but who
knows?).
JS