I got a call, and it was 'dead air'. However I noticed the post about Scotia iTrade above. I had just talked to them on that same line about 30 minutes prior, so it must have been from them as well.
Called 3 times today. I wasn't home the first 2 times but no message left. Third time I said hello once, no reply so I hung up. From now on I am not answering these calls. If it is legit they will leave a message