Stocks have started 2013 in just the sort of positive fashion I was hoping for. After the first five trading sessions of the new year, the Dow Jones was up by 1.7 per cent. As I pointed out in my last column ('Best foot forward', 4 January), a lively start to the calendar year often foretells a positive 12-month performance as a whole. We shall see. But Wall Street's spectacular opening day delivered some real benefits on the charts.