GBP/USD has put in a bearish move to start the week, pulling up shy of the 1.2500 psychological level as the pair tumbled down to fresh 18-month lows. At the source of the selling was another negative headline around Brexit as Theresa May called off this week’s Parliamentary vote. This adds an element of chaos to an already uncertain situation, and the net response from traders was a 200+ pip sell-off as additional uncertainty was incorporated into GBP prices. ...