RE: Spread16 May 2018 10:52
The spread has not doubled - its still around 0.1p or so. (EG Buy 2.8p, sell 2.71p at present). The difference is that the quoted prices are usually in multiples of 0.25p, so round up/down to get buy 3p, sell 2.5p. If you understand the system you will see why we get "strange" SP jumps.
(Don't ask me why its multiples of 0.25p, and occasionally its not, as yesterday with buy of 2.7p quoted. I suspect MMs have their own agenda for doing this.)