Maybe someone remembers or can check his data and enlighten me: what used to be the usual bid-ask spread in the FDAX (DAX futures) and Z (FTSI futures) a few years ago, say in 2004? Is it possible that this average spread changed from slightly over 1 tick (0.5 points) back then to almost 2 ticks (a whole point) nowadays?
I have not traded or looked at the Dax for a few years, but if my memory is correct, the bid/ask in the Dax was usually a tick wide, occasionally 2, back in 2004 and it moved in fits and starts. If it is always 2 ticks wide now, it must move very erratically. What is the Stoxx bid/ask like? I have heard that the Eurex has seen a huge decline in volume since 2005.