Neil Birrell: How do you know when markets have hit the bottom?

Markets are moving so fast that I feel I have to time stamp everything I write or say. To stick with that policy, this data is correct as of Friday morning 20 March 2020. Equity markets across Europe are up between 2% and 5%, the S&P futures are showing a gain of 70 points, sterling has jumped 3 cents against the US Dollar and 2 cents against the Euro and the yield on the 10 year gilt has fallen from over 1% Thursday morning to 0.58% - and it wasn't even 9am when I researched those figures! That might suggest that Friday was a good day to be buying equities and gilts, which is true, over...