Judging by the preponderance of retail sales offers throughout November in my email inbox, the rise and rise of ‘Black Friday’ should completely randomise the precise timing of this year’s Christmas retail spending. Similarly for those who think about financial markets, the three percent rise in pan-European indices during the eleventh month of this year – particularly when mated with the very low levels of volatility seen across the prices of many asset classes during the month – appears to have also pulled forward the traditional ‘Santa rally’.