If the markets had behaved badly that would obviously add to people's sense of alarm… but there has been a lot of reassurance coming particularly in the way the Brits handled all this. There seems to be no great fear that something like that is going to happen here.
What they smell isn't the emotion of fear. What dogs can smell is the changes in a person's skin that suggest fear to the dog anxiety the way your skin sweats the amount of uric acid that suddenly pours out of your pores.